I've asked this question in the past and never got a satisfactory answer and wondered if things have changed since then. Seeing that this is a web based game engine it would seem like a great tool to make a good web based game, but i'm not sure if there are any ways to monetize. IAP? web ads? it would seem like this stuff would be plentiful and easy to develop with and for..
I remember there was some Kongregate support in C2, but it didn't appear to address a way to use Kredits.. If I wanted to make an RPG or something persistent for people, it would be great if there was some built in ways for players to watch rewarded videos on web, but gold or have banners / interstitials for a web game. All of this is well established for other web games. Support for this would open up a really vast opportunity for the Construct community so it seems like low hanging fruit for Scirra to work on.
What you ask about kong is possible, but just don't forget that you must have your game submited and reviewd by Kong so you can use Kreds, and it will only work on Kong's portal so moving it outside of it will require a different service. I believe google play is capable of doing so, but haven't read more about it...