How well is Twitter's monetization going? Other than to say it's going "better than expected" COO Dick Costolo and company are fairly tight-lipped. Luckily, Twitter Japan - run by Tokyo-based Digital Garage Inc.- is not so discrete. Digital Garage predicts ad sales will generate around $20 million in 2011. The Wall Street Journal reports that this year, 82 different companies have run ads on Twitter Japan, generating approximately $2.4 million sales.
From SF Gate.