>>18155424Ads aren’t a reliable revenue stream even for people making games (that is why most apps are subscription services or have some form of paid add ones) on the Google play store, even less so in the current year.
Targeted advertising is working less and less as the internet grows more mature, through greater knowledge and use of adblock, better ability to tune ads out, and the harvested data used to target ads being less effective. Big sites are the ones that struggle the most because they both make the data for targeted ads and rely on targeted ads.