Do you say you are a media company? Because - by your definition - you are! There are plenty of media companies that don't sell advertising (eg, book publishers).
Twitter isn't a media company because they say they aren't! They see their goal as microblogging/self expression/communication (or whatever it is), and selling ads is just a means to that end. Google is that same - they see themselves as a engineering company organizing all the worlds information, and selling ads is just how they pay for it.
Compare that to something like News Ltd or NYT. They seem themselves as a media companies, and so when they run into technology problems they don't adapt well.
Do you say you are a media company? Because - by your definition - you are! There are plenty of media companies that don't sell advertising (eg, book publishers).
Twitter isn't a media company because they say they aren't! They see their goal as microblogging/self expression/communication (or whatever it is), and selling ads is just a means to that end. Google is that same - they see themselves as a engineering company organizing all the worlds information, and selling ads is just how they pay for it.
Compare that to something like News Ltd or NYT. They seem themselves as a media companies, and so when they run into technology problems they don't adapt well.