That's the basis for this lawsuit though. Reddit adjusted its ToS to forbid anyone but their explicitly approved business partners to scrape Reddit data.
I believe Google is the only company legally allowed to scrape Reddit data for AI training usage. Anthropic isn't.
Did Anthropic accept the ToS? Reddit's publishing their information on a public website that anyone can visit and read without agreeing to any terms. If they didn't accept the ToS then the only thing regulating what you can do with that public information is the usual copyright. AI training has yet to be shown to be a violation of copyright.
I really hope that this lawsuit helps to invalidate any sort of terms of service which uses this language and forces you to agree to their terms simply by loading up their site for the first time.