There are a lot of things that work in the mobile space that are use-hostile. The only reason they work is due to limited choice (or at least the perception of limited choice). Ads popping up in between games is common, let's support Firefox by randomly disabling the pop-up blocker. IAP is common, let's give users the ability to view static sites, but CSS is ten sites for 99c, Javascript is five sites for $1.99, or you can get it all for $99! Subscribers get SSL added on for only $15/mo.