And many open source developers are just fine with that. If someone finds a use for my code and even if they make lots of money off it then good for them. It's not like they've stopped me from using it in the original form. I've also had cases at work where we want to use open source and copyleft licences have caused clueless managers to get panicky despite the fact that we don't redistribute anything, only make use of it internally. They also often initially tell me not to contribute anything back but after the work is done and I explain multiple times about the effort of porting the changes to subsequent newer releases they agree (often with the proviso of using my personal e-mail). In summary, I don't follow the RMS line of closed source being morally evil or whatever so a license like ISC or MIT is the best practical match to my wishes when I release stuff.