there's no clear way to monetize URL-shortening unless you're the dominant player (and can sell stats); How much money is Google making from selling all the st

there's no clear way to monetize URL-shortening unless you're the dominant player (and can sell stats); How much money is Google making from selling all the stats that they gathered on people's behaviors, cicks, etc.? The problem with URL shorteners is that there is no space to put ads.