"We have an Airplay licensing program explicitly to assist companies in creating AirPlay capable products. Apple never said that we would pull the rug out from anyone, we in fact worked with this developer to ensure they update their app and remain on the App Store"
The clear implication there is that Apple had procedures available for getting this to work and RA just ignored them. RA's response directly contradicts this.
P.S. thanks for the unexplained downvotes.
In the end it's Apple's store with Apple's rules. The rules have changed without warning in the past and will likely do so countless times in the future. The tradeoff for this is what is likely one of the most lucrative app stores to date for developers.
In fact, the first iOS didn't have third-party apps, and when the API finally appeared, it had very clear restrictions and a $99/year fee attached.
Typical corporate trickery. The reason a lot of people fall for it is because they have an open mind (definitely advocated by Apple) and therefore are gullible (definitely wanted by AAPL).
Having written something somewhere doesn't make you less of an asshole for handling in a dirty, asocial way.