What Free Online Services Would You Pay For? How Much?

A few important questions that weren't asked:

Would your friends also pay for those services? - If your friends are no longer on FaceBook, what value does it have for you?

While those sites might be worth that money, would you switch to a free service that does the same thing? - Why pay for Twitter when a free alternative will be made available and this alternative will more likely grow faster without the barrier to entry of a credit card.

Linkedin is probably the only one I'd pay for... and may be google search also.