I agree with the previous commenter that, perhaps, you could separate out "like" (to get recommendations) and "follow" (to get future updates) actions.
When I first signed up, I followed only shows that will have future episodes, but I'd love my past favourite shows to impact recommendations.
Actually, we primarily look at just the clickthrough rate on the links to determine someone's influence. Influence is highly categorical.
For example, if I tweet about tech things, I'll get many clicks since most of my followers are techies. If I tweet about horses, ... not so many clicks and therefore I have a poorer influence for "horses".
Klout and # of followers abstract away these fine-grained details that, IMO, are critically important in determining social influence.
We're considering allowing users to have a Willet account (ie. new user name and pw). Aren't people sick of having so many logins these days? That was part of the incentive to use FB - keep things simple!
Willet works the same way. Spend away until you reach $3 of purchases, then you enter a credit card at this point. We securely store your credit card info in our digital vault. When you reach your limit again, we'll run your credit card and email you a receipt!