It is a gift of six months of the service. And I don’t think being built using OSS matters here? For example, if AWS gave Linux maintainers free EC2 instances it wouldn’t feel off.

I think what you’re getting at involves more data that was scraped illegally. Like if Anthropic gave free Claude access to writers since it just lost a lawsuit related to copyrighted books, that would be kind of a slap in the face. But OSS software is not published with an expectation of payment.