I won't mention others than
Online writers I've been following for a long time want contributions.
I'm basically a lurker on all of these different boards (this is the one I contribute the most

Online writers
If, at first when you give your writings to public at large, you are happy to receive only critisism as payment, don't try later on to make it into a paying job. This is now the only board I am or was a part of where this has not happened. The readers you have are not rich, they have payments too. The reason I started reading Online stories of anykind is that I had not the money to purchase books from a store and this seemed a good place to find some that didn't require it.
And if you try selling your stories, don't sell stories that aren't finished, one chapter a time. Would you buy a story like that? There's nothing worse than a story left unfinished.
I know it's going to hurt some feelings reading this (and not knowing who's being targeted), but really, think what you would buy, if you were being sold a full story for ten bucks, or a story that the writer would write when s/he feels like it for a donation.
Sorry for the rant