I find it kinda unethical for an app to ask you whether or not you like using it, then if you say yes, it takes you to the Play/App Store, but if you say no, it shows you a text input so only devs will get the negative feedback and not everybody else in the store.
The most sophisticated scam I have ever seen is of famous people taking advantage of their communities to promote their own cryptos in the name of a noble purpose (e.g. fighting hunger).
It's like stealing money but legally.