"If Mr.X makes a model, and Qwerty Inc. uses it in a commercial render, then sometimes Mr.X will want a rakeoff from the profit that Qwerty Inc. makes using renders including that model."

Then Mr. X needs to sell on his own website where he can establish this for his items. Not in a marketplace with what should be one standard. Mr. X can market his item to the type of group that will give him what he wants and not a group so diverse.

Just my opinion anyway. The way Renderosity is set up, it needs to enforce one license across the board.

...... Kendra