Disqus offers you sign-in using one of aforementioned services but you don't have to use that feature. You can make an account normally and sign-in using email/

Disqus offers you sign-in using one of aforementioned services but you don't have to use that feature. You can make an account normally and sign-in using email/passsword. The author says you should prefer the later, not boycott any service offering the former.