If you set your rewards to burn on memes not of your own creation you can still get votes and boost your rep, but if you want rewards you are gonna have to restrict them to original memes only.
This is the content policy of the chain.
Setting your rewards to burn allows the voters to still get paid, only your rewards are burned.
Continued plagiarism for rewards will get your account downvoted to being behind a click wall to be seen.
Nobody wants that.