It's just fishing. For every 10 users that notice the deceptive "free trial then bills per week" model, there's a guy who doesn't notice until he's been charged $15 and cancels. And for every ten of that guy, there's a guy that doesn't notice for a month, and for every ten of that guy there's the rare whale who looks at their $700/mo "google bill" and goes yeah that sounds about right.