Hello,
patreon
is a platform that allows people to pay each month for someone to produce content. Here is an example:
For the game developer:
You put up on Patreon that you would like to create an audiogame about evil frogs taking over the world. You post a link to different places and then people fund you different amounts. Each month you get what ever everyone said they would give to you to produce content.
As a gamer:
You see a cool project on Patreon and you would like to support it. You donate $1 a month to the developer and the developer delivers content.
The great thing about this platform is that one is not selling their game, so you can use something like QT, FMod and any library that has an LGPL license.
You aren't getting a lot of money up-front, but you are getting a pretty steady paycheck each month if you have people who like what you are doing.
With people here not having very much money, I think they may be able to donate around $2 a month to a game they really like.
That could be something like $40 a month for a smaller game. It is not a lot, but it is something!