At one point they started serving unsolvable captchas like google, fortunately they soon quit that fuckery and now it seems to work consistently.

It's still annoying as hell because tons of retarded webmasters block read access from Tor with Cloudflare cancer and thus also hCaptcha.

Though IMO captchas are not a fundamentally bad idea for blocking robots from having write access to a service, not malicious humans. They're just overused by idiots who have no fucking clue about what they're doing, which is mainly why half of the modern web is completely unusable on Tor. (There's also the minority which knows exactly what they're doing, aka Google.)