Well yeah, that's the point. Trading contributions vs maintenance burden.
> My point in all this is that contributing to open source often benefits the contributor more than the maintainer
And yet they choose to do it... Why?
As long as the contributor isn't a cloud provider, they can continue to use the software unimpeded under the new license. Their contribution continues to be maintained by the maintainers. The contributor hasn't been "fucked over" in any way.
If the contributor is a cloud provider, they can choose to enter into a commercial licensing / revenue share agreement and continue to use the software unimpeded. Or they can decline and use/create a fork, in which case any so-called fucking-over is clearly mutual, because the contributor wants to profit from the software explicitly without making its ongoing development financially sustainable for its original maintainers. That's parasitic behavior.
I must ask, have you contributed to Redis? Or are you just expressing outrage on behalf of other people who actually contributed to Redis and may not actually even share in said outrage?
If the latter, why are you so emotionally invested in this topic? And have you ever been on the other side of the coin, maintaining a widely-used open source project?
As you said above, maintainers don't have to accept your contribution, and if they do, they always have the option of removing it in a future release. And if the maintainers use a CLA or other copyright assignment mechanism, they also have the option of changing the license for future releases. So why are you assuming you can keep using future versions of the product forever if you contribute to it and sign a CLA?
> Sure, and they could've kept it private so it only benefits them and/or their employer
But that doesn't actually provide a net "benefit" to the contributor, because then they have to take on the massive burden of maintaining a private fork.
My point in all this is that contributing to open source often benefits the contributor more than the maintainer, and yet people act like it primarily is an altruistic gift from the contributor which solely benefits the maintainer / product owner.