Most everyone has no problem with a one time online authentication, but online saves? No...just no. Most people are definitely not going to be fine with it. It's a stupid idea anyway. I get home from work itching to play some Ass Creed II but my net connection is currently down for whatever reason, or Ubi' servers are down, how then do I pick up from where I left off? I don't? Ok, no sale.
“There is no such thing as a weird human being. It’s just that some people require more understanding than others.” - Tom Robbins