reCAPTCHA version 3 supposedly figures out "are you human?", and Google won't say how, but experiment shows that the main question it uses is "are you logged in on a Google account?"

Anti-trust rules could help deal with this, if they prohibit Google from inviting lots of web sites from making use of a Google account their criterion for letting people log in. Competitors to Google can't possibly test that.

It also penalizes users that browse via Tor. Since I won't trust these companies to know where I am, I won't turn off Tor to use a web site. I simply won't use it.