Today I noticed something called Helium where there is profit sharing with anyone who posts to their topic lists. I suppose the result could be something like a moderated newsgroup with paydays.
By comparison, if you post to Usenet and read it on Google Groups, your reading and writing supports Google's advertising revenue. You don't get a share.
Here's an Abe Lincoln thread. USENET-quality writing is here, but now posters are getting money to write up such insights as, "Abraham Lincoln was a man of Character, of Ethics, of Morals. The world has not seen the likes of such a man since him."
Fascinating. The business model, I mean.