Developers that use offerwall advertisements are losing out on thousands of dollars daily after Apple suddenly began enforcing its rules on incentivised installs by banning them. An offerwall is an ad unit that lists various offers users can complete to get a reward in the app they’re playing. This can include watching a video, completing a survey or installing another game. According to IronSource's website, 25 per cent of the top 100 grossing games monetise with an offerwall. Under section 3.2.2 of Apple’s App Store review guidelines, Apple states it is unacceptable to create “an interface for displaying third-party apps, extensions, or plug-ins similar to the App Store or as a general-interest collection”. The crackdown affected a number of ad companies that provide offerwalls, including Tapjoy, Fyber and IronSource, as well as numerous developers and publishers that use them. Story here