Because a console = 1 video game? 15$ a month is cheap for a service. For one video game, it would probably be the most amount of money anyone would spend on. Believe I spent over 700$ based on the amount of time I played WoW (not saying the payment isn't fair, it was money well spent).
I left WoW not because of the payment model. If anything, microtransactions like the OPs would throw me off even further. It may be a perspective thing, but I don't pay per text-message, minute, etc. when it comes to anything like cell-phones, games; hell I hate paying per hour back when I did LAN cafes. But that's just me.