Funny you should ask. I tried signing up for Quora once. I figured "Okay, they really want me to sign up, and they say it takes 'seconds', so maybe this will be better and more convenient overall."

It did not take "seconds". I forget what all the sign-up steps were, but there were a lot of them. Eventually I decided this was way too much effort and information for me to give a site I don't even like, so I left.

Weeks later, I tried to follow a link to Quora again, and it wouldn't let me see anything because it was redirecting me to a page that wanted me to finish the sign-up process. I had to spend even more time convincing it to forget I had ever linked it to my Google account.