If you google "roberto carreño avengers apps" (name of the guy and name of his business which probably causes trademark issues) You'll find a bunch of screensh

If you google "roberto carreño avengers apps" (name of the guy and name of his business which probably causes trademark issues) You'll find a bunch of screenshots of random cheap looking apps that find wallpapers, phrases to tell to girls, spanish radios search. So they most definitely rely on ads on their apps and not on building good ones.