some of them are also less bot detection and more spam limiting and mitigation. cloudflare’s has more stuff built in I’m sure, but things like mCapcha are just proof of work, so if you’re trying to make a bunch of accounts or whatever, it’s really computationally expensive.
it’s tied to packagekit, so tumbleweed should work ootb. opensuse’s immutable distro is less likely to be possible though, as well as anything else like that