Twitter gives the lowdown on its new business model | Social Media | Macworld

> There will be two “pillars” to Twitter’s business model, Chief Operating Officer Dick Costolo said at the company’s Chirp developer conference in San Francisco. The first, announced earlier this week, is [Promoted Tweets](http://www.macworld.com/article/150571/2010/04/twitter_ads.html), which lets advertisers pay for sponsored tweets that appear at the top of search results for certain keywords. via [macworld.com](http://www.macworld.com/article/150650/2010/04/twitter_revenue.html?lsrc=rss_main)I don’t know. Seems like the classic old…