cagraham writes: Twitter has 218 million active users each month, according to their SEC filing, yet some advertisers are suggesting that number isn't big enough for them to effectively monetize. Facebook, in comparison, has over 1.15 billion monthly users. It isn't solely numbers though. Apparently Twitter users check their feeds less frequently than Facebook users (although really there's probably 99.999% overlap here), making advertisers less sure that their ads will be seen. If Twitter wants to command higher ad prices (and turn an actual profit) they'll have to figure out a way to convince more people to more frequently use their service. Such news should also serve as a warning to other social platforms looking to monetize solely through targeted advertising.