This app was mentioned in 3 comments, with an average of 1.00 upvote
This is exactly the type of thing I was going for in my first game - GemJam. Optional ads, that rewards the user for opting in.
Crossy Roads has made over a million with this strategy.
@Patrick_DN I'm an illustrator and designer - just released GemJam to Google Play
Follow me to see my latest projects
https://play.google.com/store/apps/details?id=com.MutantPigeon24.GemJam
@MutantPigeon24
I'm starting to use it more frequently now as I've just set up a Wordpress Dev Blog that I'm slowly filling up with content.
Majority of the Game Dev tweets will be concerning the progress of GemJam.