Stop and be flattered, you're clearly doing something right. If they're just copying you, continue to innovate. If one of them actually manages to come up with

Stop and be flattered, you're clearly doing something right. If they're just copying you, continue to innovate. If one of them actually manages to come up with a good idea, steal it. Above all, realize that the idea itself is not sufficient. The value lies in you, not the idea. You have to deliver a better product.