Monetize for Google Play store

I've searched the forums but couldn't find anything solid.

What's the best way to monetize my game for google play?

Could I just use any old ad service and put an iframe banner in my game?

Question to everybody:

Did you ever sold a copy of your game made with C2 on Google Play store for real money?

Thank You for answering.

IMO, it's very difficult to charge for games on the google store, so I don't bother. My games sell pretty well on iOS, but for Google I always just add ads. It's a nice constant stream of income (See the case study in my signature).

I've done it with CocoonJS on 2 games and phonegap using Admob with another 2.

WoW! Good job! Thank You.

Question to everybody:

Did you ever sold a copy of your game made with C2 on Google Play store for real money?

Thank You for answering.

Yes, I have one game up there right now. Only sold 8 copies in the past month, lol.

That's mostly my fault for poorly naming the app, poor banner graphics and absolutely no advertising.