500px has entered the world of commercial photo licensing. They have launched 500px Prime which will give photographers 70% of revenue from every sale.
At the moment 500px Prime is an invitation-only service. Let's hope it will work out.
The stock photo market has been described in recent years as a race to the bottom. The industry is plagued by low royalty amounts – sometime pennies per photo – and the slashing of royalty percentages. It is bad business and it’s simply not fair. There must be a better way to do this.
http://500px.com/blog/1043/500px-prime-making-the-world-of-photography-a-better-place