There seems to be a line, so far as I can tell. If everything you need sits on the free tier, they’re really good (well tbh their R2 storage is reasonably priced too). But once you stray into needing a paid tier, it apparently (I’m not there) quickly gets expensive as you’re lured into every higher tiers.

But yes, in general I don’t mind cloudflare so much and do use their free (and R2 paid) services.