I accidentally bought one of them.. requested a refund before I even booted the app now. I found out thanks to jigglypaint while I was looking around YouTube to see if I'd like the app, and then noticed how recent the app I got was and started to dig a bit further. The app I had downloaded was ranked so high and has no mention of internet janitor unless you go to the developer website that's not listed in this devlog and scroll down through numerous ads to reach a credit that says it's made by you.
It's currently ranked 6 in graphics and design so they're really making a lot from it likely.