You should get accountable legal advice for any specific project you may be involved in. This is not that. Consider that at least common law countries don’t re

You should get accountable legal advice for any specific project you may be involved in. This is not that. Consider that at least common law countries don’t require payment to honor contracts. They require legal consideration, which can include mere promises in return. Have a look at Jacobsen v. Katzer and more recently Artifex v. Hancom. Both copyright and contract claims. There are other interpretations. I’m not aware of any US case law on warranty claims against open source contributors. I’d expect to see it first in jurisdictions with laws limiting broad disclaimers, like Germany.