I thought they paid out because they had advertising on the pages at some rate higher than the payout.

For example if they were receiving .00002 per page from ads then they'd pay out .00001 per view.

I found things like the Cyclorama backgrounds useful, and thought there's something for everyone.  What one person or most people might not find useful or of good quality, someone or even just one person might need and want.

Hopefully not paying doesn't mean all the items on ShareCG will disappear.