Seems to be doing something odd, code of the page includes some XmlHttpRequest to a blog site with randomized query string (see end of https://pastebin.com/W21Au8RK), along with some fingerprint library (though commented out)
That blog site loads very slow for me if I go there manually - maybe some kind of DoS being directed to it?
Seen this same faux-cloudflare page used on btdig.com too, with the same strange XmlHttpRequest & fingerprint code, pretty weird.
Except I have JS disabled and can't complete the CAPTCHA interstitial.
I will only add that as far as I can tell, neither side is exactly doing anything wrong, other than the fact that they both could have concocted some sort of special handling for each other years ago if they wanted. The failure to bother is on both I think.
I wish people would stop giving out this incorrect direction.
Wouldn't be surprising - these services were basically stealing content from other sites and replacing original ads/tracking/spyware with their own.