And, how much money would you pay for membership? As for me, i'd pay $6.00 a month maximum as it would give me access to my Facebook fan pages, lots of Facebook games and my online friends who i see only on Facebook.
I would never pay a cent. They get their money through ads and more, plus there is always another site ready to be made with free services.
What if they suddenly cut access to Facebook pages except for paid members, would you buy a premium membership then?