To be perfectly fair (although I totally agree with you!), if a project is copylefted and receives community contributions under that license without a Contribu

To be perfectly fair (although I totally agree with you!), if a project is copylefted and receives community contributions under that license without a Contributor License Agreement (which is arguably a bad and susect thing to require), this then makes the fork to more permissive much harder as it requires everyone's buy-in, whereas the fork the other way is always feasible, but still has the issues you bring up. Overall, it would be a great thing if all code were AGPL and everyone had to simply work out reasonable livelihoods and business arrangements within that neutral commons framework. The issue is that a world of mixed proprietary and open code is an uneven one with tragedies of the commons. Copyleft helps avoid those tragedies, which every player actually wants to avoid.