That’s why you should try to use apps from reputable developers, who’ve already had countless such offers and refused them all. The usual "400$/month per 1k us

That’s why you should try to use apps from reputable developers, who’ve already had countless such offers and refused them all. The usual "400$/month per 1k users" stuff, just integrate an ad network is common, but sometimes as dev you even get offers like "we hire you, with a contract, you can’t be fired, legally you’re a consultant to us for 2 years, at a few hours per week officially, for a silicon valley wage, unofficially you just don’t do anything and collect but we get full control over your apps". Personally I’ve had quite a few such offers, and I’ve rejected them in the past and will also reject them in the future Trust devs who’ve proven themselves :)