One of the trends on the Internet - content become paid(news portals, different infromation resources, even torrent-trackers). Will be appear web-resources, that allow users to earn money by selling access to their content(in different forms and ways)? Whether such system will get popularity, when content will not publish free on youtube, flickr likes now? It will be necessary to buy account. Or in free version user get limited access to publishers content in such system. The main sense of such system - users in different forms and ways pay to content publishers.
What are you saying, I'm going to go with what i think your saying: Sites where you share things are indeed starting a trend of having versions where you get paid for your content, which is a trend which will grow, in my opinion.