In the case of Redis, I think that it's a really deserving project and I fully trust the integrity of the people behind it.
As someone who created a popular OSS project outside of Silicon Valley, I can relate to how difficult it is to be an outsider in this industry and I understand why Redis Labs would feel entitled to capture a tiny fraction of the enormous value that they created.
I think that if the Commons Clause is just related to optional things like plugins or addons then I honestly don't see any harm; at least the plugins/addons are still available for small companies to use for free so it's still a step up from the typical OSS freemium model where they sell the plugins.