In the end we are not asking Ashley and co to make crazy game specific plugins. We are asking for working basics from A to Z and IAP/ IAD are the most basic of all.
Sell them for $10 each if needed and hire a junior developer to keep them up to date but enough with the stubbornness. The community is asking for it so perhaps it's time to listen.
While I say that the engine should include working IAD/IAP plugins and support for major platforms (like we have now), I'd be gladly giving Scirra 10$ for platform specific up-to-date plugins each (like Kongregate, etc..). But again, it's none of my business how Scirra manages it's company/products.