Apple's App Store developer guidelines are extensive, even fatiguing, in their length and specificity, but they make one point perfectly clear: If your app includes any in-app purchases, they must be executed via Apple's own in-app purchasing platform. If you try to sneak your purchase or subscription feature around Apple's own tools, your app will get the boot -- no matter who you are, even if you're one of the largest digital dating services of all.
Source: http://www.wired.com/gadgetlab/2011/12/match-iphone-app-pulled/
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