Since the release of iOS 6.0 last fall, Apple has gradually begun changing the rules for in-app advertising and device identification, transitioning developers to a new “Advertising Identifier” in place of the older, permanent Universal Device Identifier (UDID). iOS 6.0 introduced the ability for users to opt out of this new form of tracking entirely via a rather obscure option tucked away at the bottom of the About screen in the Settings…
