A business model for Twitter: Pay up
The Web spirit of "build an audience and figure out the business model later" is a great filter. It allows products and services into the wild without barriers or the need to sell advertisers on an unproven concept.
Those who can build an audience, such as Twitter and FriendFeed, and before them Google, Facebook, and dozens of others who turned into giants, have the scale to develop monetization schemes that a loyal and fanatic user base won't ...
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