Twitter話題(ソーシャルメディアを使った予想)ついでに、Twitterがどこから収益を得ているのかについて(ht @gshibayama): Twitter Has a Business Model: ‘Promoted Tweets’ The promoted tweet is one of three streams of revenue Twitter will have available, including a data fee from search engines indexing Twitter in real time, such as Google, Yahoo and Bing, and the coming “professional accounts.” 三つの収益源が示されている: Promoted Tweet Data Fee Professional