Exactly this. Apps and websites get copied all the time. Somebody throws up a duplicate with ads and steals your traffic and search rankings and customers and

Exactly this. Apps and websites get copied all the time. Somebody throws up a duplicate with ads and steals your traffic and search rankings and customers and whatever. Adding code to prevent your product from working when it's not on the right app/domain, and obfuscating your code to obfuscate those checks, can be sadly necessary. It doesn't need to defeat a determined attacker, but just be hard enough they'll spend their time cloning something else instead. I speak from experience...