I tried this out for a couple of weeks after the "Adblock makes things slower" article came out, and I found it was blocking more stuff - but not necessarily the right stuff. I was finding that sites were breaking, stuff was disappearing and it was because of uBlock. I think I was trying to log into Medium and the Twitter and Facebook had been hidden, literally breaking the functionality of the site. That's not what…
To me any website that rely on facebook or twitter to log in is broken and I just don't use them.
I recently had one that required sending my info to xiti to display a js popup to log in with email. Too bad they lost a potential client for their service because their web page sucks and is designed with them in mind instead of the actual user.