If you have 90,000 artists' galleries, and each gallery has 50 images at 200 KBytes each, then you need about 1 Terabyte of server space to host all those masterpieces. Then you need to pay 4 guys to maintain the server farm, plus the cost of the lines into the farm, plus the cost of the servers, maintenance and upgrades. So it's costing Renderosity quite a bit of cash just to host free galleries. Historically on the Internet there are two factors that are famous for killing free sites: server space costs and throughput (bandwidth) costs. My guess is that Renderosity is getting to the point where upload and hosting costs are increasing faster than revenues, so they have to increase revenues to maintain the same level of service. It's definitely something new. I wonder what Rubens, Cezanne, Dali or Warhol would have said if somebody told them about a place where 90,000 artists gather?