Some of us use a real-time 3D development kit for things other than creating indie games. For example, I may create a one-off real-time 3D application for a client ... something that is not sold in a store or online, but used by a company for a particular purpose. Would S2 restrict my price for this application?

In any case, I live in a free market society. I do not like anyone telling me that I can not sell something above a certain price that I have spent my time and effort on creating. That should be my business, not theirs.