Well, some things:
-interstitials bring more money;
-it’s a good strategy to plane one on user’s exit, when he’s bored with the app;
-ask people to rate your apps, that way the rating will grow and probably improve your apps in the rankings.
It’s been for three years?
Your apps are simply lost/sink among others apps and could not be found in any keyword.
If no one download your apps, you don’t make money.
My suggestion: create new google dev account, and republish them. Make sure you have certain keyword to target in your description.
Good luck!
I see your oldest app is public on Apr 30, 2014 just 1 year.
If you want to make money try to get many install and then use ads.
The key is active user mean it useful for them or they like it for game
I’m looking to find the best apps that people can sign up with to make money . I know there is what’s poppin and just a couple others but I’m looking for a better list of sure fire easy apps to make extra money with