1. They have some amount of advertising revenue with Twitter Japan 2. Then don't. There's plenty of Twitter-clones out there, in itself it not necessarily a co

1. They have some amount of advertising revenue with Twitter Japan 2. Then don't. There's plenty of Twitter-clones out there, in itself it not necessarily a complex software to make -- the engineering challenges would be scaling it. 3. Why VCs investing into it? Because of the team (Evan Williams primarily) and because of the network effect already growing. Unless you are Evan Williams or have a chart showing more and more users each day, your ability to garner VC money is hindered greatly. 4. What's the exit strategy? Ubiquity can lead to some very interesting things. As an utility, it's appealing to a service provider (Verizon, ATT, Tmobile). As a social network, it's appealing to a web company (Goog, Yhoo, Msft). As an advertising platform, it's appealing directly to advertisers (AdSense, SEM, PltA).