Why did Mario cross the road/bridge of death?

I've just read this interesting article about new feedback loops in game design http://www.eurogamer.net/articles/feedback-loop-article

It's funny how much it all sounds like using Google Analytics on a website, and I'd be quite interested to have a gander at data for something like Super Mario World. Did everyone else die on that damn cheese bridge level?

Anyway, with this stuff standard behaviour for websites designers, and now games going at it, I wonder how long until we start seeing widespread tweaking of TV ads based on people ranting online.

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