That's exactly what Terraform and Redis did.

The open source license is designed to guarantee your liberties. The moment you start to remove some liberties you have neutered it.

There isn't a well known / widely accepted license with such clauses (afaik, happy to be corrected). Noone other than individual tinkerers will ever touch anything with a custom license or any license ambiguity for that matter.

Meta's LlaMa for example is "OSS" but under a custom license which effectively prohibits hyperscalers from using it

They can just open subsidiaries and use that to go around them. Also the big guys do donate a lot of money.

The real reason might be VCs. The companies going closed source have raised from VCs and they are pushed to more and more growth just changing licenses and taking control.

That change makes it no longer free/open source.

such software cannot be included in many popular linux distributions which means less people are going to have easy access to it.

I mean that's basically what they're doing. The BUSL license these projects are using boil down to "you can't resell the project against us". But that's a non-starter for many folks and the companies using such a license are the devil.