I've also seen some scam app advertising their site in some advertising platform, I even have my share of doubt clicking on the advertising link on google nowadays.
now even playstore and app store is not safe, really make me think hard how a platform that's supposed to be strict and be the only source of app (app store in this case since they doesn't allow sideloading) can just let some scam apps slip through, didn't they recheck?

app store is famous for having really strict publishing rule and yet this kind of thing could happen. google play on the other hand is also more or less the same, their regulation of app publishing also become stricter. but that doesn't seem to work really well doesn't it.