Bill Gates quits Facebook over 'too many friends'

Bill Gates quits facebook over "too many friends". I knew I was cool, this is exactly the same reason I quit facebook. Now, why don't I have a bazillion dollars? I'm doing this wrong.

Gates, who remains Microsoft chairman, said he had trouble figuring out whether he "knew this person, did I not know this person".
"It was just way too much trouble so I gave it up," Gates told the business forum.

When the primary reason for using a service becomes a hassle, what can the service do?