> But, if they wanted to get more people using their library, I think that they should rethink their approach.
They actually don’t want as many people as possible using their library. That is not the goal when choosing the GPL. The goal is to maximize the number of free users in the world – that is, users who have the freedoms which define Free Software. Mere users is inconsequential. If users is what you desire, then by all means, choose a permissive license (MIT/BSD/etc).