I had a couple of minor styling issues once with one of Squarespace's templates. I emailed customer support and they pretty much could not have handled it any better. They were in constant contact with me and fixed both my problems (which required dev team action) quickly and totally to my satisfaction.

I was never asked for my password and I doubt very much if that's normal procedure. Without trying to sound like some shill account, I can tell you that Squarespace made a loyal customer out of me by giving me the kind of support they promise, but which I had previously assumed was sales-talk-BS.

I'm going to say it was a case of number 3 on your list.