And for any that are skeptical about the gambling link, think about the now-ubiquitous pull-to-refresh gesture on mobile interfaces -- does it remind you of anything... like a slot machine perhaps?
Even worse than gambling--the output isn't random. You can actually affect the result, a lethal combination for gambling behaviors. With slot machines it's at it's worst when the gambler believes there's a system that works. In this case there actually is one making it capable of drawing in folks who would not be at risk of being pulled into a slot machine.
