> Problem with Anthropic is that they benefited massively from open source and now are completely against it

Uh, no. They're against open weights. They benefited from open source. Not the same thing.

And the terms of those open-source licenses explicitly allowed usage of the code for whatever. They're using it exactly as licensed.

> Why do they get to benefit, but not everyone else?

How many tens of billions of dollars have you invested into training models?