This is a typical brute behavior. It's not about breaking a rule or two for the sake of success, it's about doing it while riding on people's backs. You think that stealing someone's voice is ok for a small startup company because you don't have the budget to know better while this is not the issue at hand. You obviously know this is wrong and are trying to get away with it riding on people's good intentions.

This is blunt and clear immoral behavior and you are fully aware of it. You just think that you have the right to reach success not by your own skills, but by stepping on other people, and until they complain you'll keep doing it.

PS: Even if Amazon does the same thing it's no excuse for you. Look up tu quoque fallacy.