According to post 32 on this topic, and as far as I can tell the statement was somewhat hypothetical, there were bounced messages triggering errors of some sort. I think the post speaks for itself though, more or less saying that, and I quote, I've disabled the option to subscribe to posts since it caused a problem in our host." Suffice it to say, our lives are just a little sadder today because we must live without this feature until such time as the people in control of it figure out the actual issue, the cause of the issue, and finally, the solution to the issue. Boohoo hoo! Issues!
Email bill? I wondered who was paying spammers nowadays. Turns out that money really is coming out of my own pocket...
When life gives you oranges, demand lemons since everyone else is obviously getting them.