We started the monetization part of AppBrain for very similar reasons about 5 years ago. We chose to have a very predictable set of ads (only non-incentivized a

We started the monetization part of AppBrain for very similar reasons about 5 years ago. We chose to have a very predictable set of ads (only non-incentivized app install ads) that have a better user experience than regular interstitials. Especially at that time, there were quite some scammy ads out there and our business grew quickly. Now that Google Play has cleaned out most of the bad acting ad networks it is a challenge to attract new developers who recognize the benefit of a good user experience over the slightly lower eCPMs that may go with it. I wish you best of luck!