We will also be looking in to IAP and ad support for Crosswalk/PhoneGap for the next beta.
I used phonegap since dreamweaver first supported phonegap (not phonegap build service).
And I had it on my mind and struggled to make app which support all platforms phonegap provided.
The dream starts to be realized with construct2, now.
I made native & c2 Phonegap Admob and c2 Phonegap IAP plugin.
Among them, I made Phonegap Admob native github plugin by myself.
If you use Phonegap Admob native github plugin in official c2 Phonegap plugin, I can support you beside and the reliability from that will affect my business affirmatively.
(If you want natvie iAd plugin, I can also supply and support it. (It also I made native plugin), and others also supply)
Now, I made Phonegap Admob and Phonegap IAP plugin free.
I wonder what's your thought about this?