@ariadne @mjg59 again, not a software licensing expert, but from my perspective, if someone is going to take my work, build something on top of it, make money off it and not "share and share like" with the community, I want them to pay me. In practice, this of course means they won't try and build off my work, but I am OK with that. Whether that's an advantage to the "consumer" is I think a side issue. If I give my creative work away, I want its fruits to remain available to all.