Passage: Stallman said that this is where people get the misconception of "free": there is no wrong in programmers' requesting payment for a proposed project.  Restricting and controlling the user's decisions on use is the actual violation of freedom.  Stallman defends that in some cases, monetary incentive is not necessary for motivation since the pleasure in expressing creativity is a reward in itself. On the other hand, Stallman admits that is not easy to raise money for FOSS projects.

Question: What are some of the uses of restricting and controlling?
actual violation of freedom