There's interesting information in that report of Twitter's ad revenue. It makes me think more about about the type of ads to run and to whom it should be targeted.
Twitter's Ad Revenue From Mobile Appears Greater Than From The Web [reuters.com]
Twitter has generated more advertising revenue from its mobile platform than from its website on many days in the last quarter, CEO Dick Costolo said Wednesday, highlighting Twitter's progress in squeezing ad dollars out of the growing number of smartphone and tablet users worldwide.