We need a new license. My hope is currently residing in the Post Open License. IINM it will legally define how commercial instances have to contribute back or pay to opensource maintainers/devs and how it will work in complicated dependency trees.
Also, IMO, we should stop using weak copyleft stuff like MIT, Apache, MPL, etc. GPL and AGPL seem like the best licenses to force companies to contribute back, even if it's not monetarily.
I do like projects that say "any support requests require a contribution (monetary or otherwise) and will be ignored otherwise". It's a fuck you to companies that create support requests and don't pay or contribute.