are there age requirements? I would be extraordinarily interested in this

There are no age restrictions, however if you are under the age of 18 we ask that your parent or legal guardian is involved in the process for your safety.  In essence your parent/legal guardian must initiate contact for you and Commtech USA, along with your parent/legal guardian, would sign a legal agreement concerning your course creation and financial payment for any courses you create.
the reasons for this move are many and most of them have to do with security and liability and whatnot, but I'll outline some of the more important takeaways you can infer from this post.
1.  Commtech is releasing self-paced training courses to blind individuals at an affordable price.
2.  These courses have to meet the standards set by vocational rehabilitation agencies.
3.  The reason for the above is quite simply that not only will the average blind/VI person be our general consumer, but we also target the sighted instructor, the parents of blind and visually impaired children, and members of the collecdtive workforce.
4.  A Commtech employee who releases a course of any kind must be able to provide ongoing support for that course.
5.  Finally, a Commtech employee who releases a course through Commtech USA must be willing to accept that once the course is released it is no longer their intellectual property.  We understand that not everyone will agree with this move and do not take disagreements personally.  this is usually the kind of things that puts potential course creators off because their vision does not necessarily align with Commtech's ideas, and that's ok.
If you have any further questions, feel free to reply on this topic and Nightshade and I will answer wherever possible.

That all depends on the quality of your course, how well it sells and how widely it is received.  this is actually why the course, once up for sale is no longer your intelletctual property.  Let us outline a possible scenario.
1.  You produce a course on the fundamentals of setting up a linux box from scratch.
2.  You feel you have produced it well and submit it to us for review.
3.  We agree with you and discuss pricing.  You believe the course should sell for a hundred dollars and we agree to that.  The problem here is a difference in our setting up that course to work with our platform, the cost of promoting that course, and anything else under-the-hood a course creator does not necessarily have to consider.
The answer?  Commtech likes your course, agrees with your course being valuable, sells and markets your course, maintains your course and, in the event that you cannot provide support for it or something goes wrong, steps in to fill that role.  Commtech agrees you should receive 50% of any profit made from course sales; this is a lifetime pledge.  What that ultimately means to you, the course creator, is that even if Commtech loses its 50% for any reason, be it because we had to pay extra for promotional or marketing purposes you would still collect $50 for that 100 dollar course.  In the event that we cannot come to a price agreement, your course is not sold through Commtech USA and you are free to try and distribute it as you see fit and the course is still your intellectual property.
So, to recap, any course you sell through Commtech USA entitles you to a lifetime 50% profit.  the only time your 100 dollar course might not make you 50 dollars for a sale is if a discounted price is offered, but in the event of a sale or bundle we wish to include your course in you would in fact be notified of any price changing in advance.  An example?  Labor day is about a month away and widely regarded here in the US.  We decide to discount prices for all of the products and services we offer for a huge laborday sale.  Commtech would notify you that we are going to do this and ask you if you would like to participate by including your course in that sale.  We decide that all courses sold through Commtech USA are 20% off.  You make 40 dollars.
In the event you've missed it, however, this also means that the more courses you sell through Commtech USA, the more money you stand to make.  All of this goes hand in hand and is more or less common sense.  More quality, more quantity, better sales and recognition, thus more profitability.  You do something you enjoy doing such as teaching linux or showing off setting up Raspberry pies as accessible security systems or, well, whatever your tech hobby happens to be and you make money teaching it from an accessibility standpoint.
As previously stated, if you have any further questions do feel free to keep sending them this way.

@jimmy69: Commtech USA delivers information technology and assistive technology consultation, training, and support. So I would generally be prepared for your potential work to involve technology of some sort. They did say the courses could be about anything you can write about just as long as they are accessible, however.
@nocturnus: If the work is commissions based, am I correct in assuming that none of these positions are scheduled or hourly work? Or at least course creation would not be hourly work since income for that is based off of sales?
Additionally, who do I address the cover letter to when applying? I searched the application page and could not find a specific person to address the cover letter to, and I realize it is generally good practice to avoid a generic "Dear Sir/Madam" if at all possible. However, I could not find anyone related to hr/hiring staff on the contact page either. Does it need to be addressed to anyone in particular, or just to the company as a whole?
Thanks!

@Techmaster20: You can also find postings from them in a few Blind Bargains classifieds posted a while back. That was the first time I had heard of Commtech.

@Nightshade: Ok, great. That makes sense.
Thanks!

@ post 13
No deadline at all. We will always be hiring course creators.
Jessica Melchor
Manager of Customer Service and Sales
Commtech USA

I would be interested in a sales position. How much would I be looking at it as an income? How often could I work? I’m very interested

@Blind angel, post 15, no, you don't pay anyone to join the company.  This is a real job in a corporate environment.  You apply for your position; you interview for that position.  If you fit the ticket you are then given that position.
@jimmy69, post 16, the sales position works on the idea that you market and must make a sale for commtech USA.  Any sale that is $100 or less pays you 25%, any sale from $100.01 to $250 pays you 20%, $250.01 to $500 is 15%, and anything above $500 is a 10% profit.
You would receive an affiliate link that is entirely your own so that we can in fact monitor your sales record and you would be paid once a month based on that record.  Alternatively, if a person calls in and mentions you by name this would also count toward that record.  If you promote and market on a regular basis without your affiliate link or a sale is completed over the phone and your name is not mentioned, we cannot know you were responsible in influencing potential buyers.

I am super interested in this position! I've been trying for months now to establish myself as a consultant, independent contractor, or business owner because I am specifically targeting an audience that might be able to benefit from three potential ideas. I decided to reopen my case with Voc Rehab to see if they might be able to help me determine whether any of these ideas were going to be feasible.
I could probably create some courses or promote sales, though from what I can infer, if you are promoting and advertising, you will have to have capital to begin with.
I also wonder if Voc Rehab will be able to pay the cost of a good audio gear for me to do the recordings, such as making short blurbs to put on podcasts or audio ads.
Edited to add: @11, you said that the course can be about any subject as long as the material is accessible. However, upon looking at the site's content, it appears to be mainly about assistive technology. So, would CommTech USA consider a course about reading music Braille and basic music theory to go along with it?

Yeah, that would be a good supliment to my audio engineering courses...

@Green Gables Fan, post 23, we're more popular in more states than others as far as VR goes, California, Arizona, Atlanta and Florida as examples.  Texas and Missouri don't like us much because we refuse to play by their rules for the most part.  That having been said, we're able to work with any state in the US and don't mind being pushy if necessary when diplomacy seems to be failing.
For anyone headed to the NFB Career fair today, expect us there as well.  We will be outlining most of what you've already read here and taking questions.  Beyond that, it's business as usual and we'll still be watching this topic as well as responding to application submissions and any other matters presented to us as soon as we can.