some kind of GPL + no CLA = good. If you contribute to GPL Redis, the Redis company cannot relicense your work, because they own it as much as you do. GPL + CL

some kind of GPL + no CLA = good. If you contribute to GPL Redis, the Redis company cannot relicense your work, because they own it as much as you do. GPL + CLA = bad. If you contribute to GPL Redis and transfer the copyright to your contributions to the Redis company, they can switch to whatever license they want. SSPL + no CLA = interesting, I would love to see the Redis company open source their hosting stack because they are accepting external contributions.