Comment by rcxdude

The freedoms that the GPL gives to users in effect means giving your software away for free (because any single one of them is allowed to republish it openly). I do think there is a possible alternative model which gives most of the user freedom Stallman cared about but which doesn't produce this (something along the lines of being able to view the source code of software you buy, as well as modify it, but only being allowed to share the modifications with others who have bought the software, or only being allowed to distribute the patches as opposed to republishing the full software), but this hasn't really been tried as far as I know.