I would imagine they have growth targets which would tell them if the service is on its way to becoming a mega hit. No one can expect a new product to get to th

I would imagine they have growth targets which would tell them if the service is on its way to becoming a mega hit. No one can expect a new product to get to that place in just a couple of years, but that is enough time to tell if you are on your way. If not, then it is time to either change strategy or shut it down. Googles decision seems most often to shut it down