Lots of firms/services allow login with 3rd-party (ie github, google, fb, etc) but the worst offenders pull an extra step. After authenticating, you then get kicked into the usual make a username/password, verify your email nightmare. If a site integrates with a “login with...” there should be no further exchanges of data or additional steps /rant ☃️❄️⛄️🌲🌲
Why are you logging in with third party? Aren’t you making it easy for data scavengers?
Convenience/speed— can also make dummy or login-only accts