Because it is a shit-ton of money. It is not like an app is going to be a multi generational sustaibale business. It will be on trend for a while, print money,

Because it is a shit-ton of money. It is not like an app is going to be a multi generational sustaibale business. It will be on trend for a while, print money, and then be the next angrybirds or clubhouse (if you are lucky). Chances are the users will have moved on before the users of the app have.