I've noticed that the captcha appears on serv00 service domains too, so my theory would be that they set up a proxy (like nginx) to intercept ANY request coming through their servers and block bots/scrapers.
This might be still in beta testing because some services like their matomo metrics (the one you find in WWW websites -> statistics) broke, and probably also some other ones that I didn't check.
Still, let's hope they find a way to let us toggle this in the panel.