@p There's quite few things at play:
- I'm familiar with most people involved in Redict, so I casually gave a hand, also first fork which got meaningfully created by a pretty wide margin
- Redict also has interest of distros at heart, while Redis OSS had quite few things to fix there like allowing de-vendoring
- Valkey meanwhile is purely corporate*, absolutely no interest for me there, I'd only send a patch if I already had to write it

And as far as licences go, I think the LGPL offers a decent level of protection against what happened with Redis without being a PITA in terms of license compatibility with existing software.

*I take the Linux Foundation as a the biggest linux-invested corporations in a trenchcoat, rather than something at least a bit independent from them, or at least a bit more ~democratic.