What’s Wrong With This Receipt?

I visited an establishment recently, and when I looked at the receipt I noticed something that bothered me a bit.

Do you see anything wrong with the receipt (other than it being edited to protect the identity of the establishment)? If you see nothing wrong with it, thanks for reading this far and have yourself a nice day.

Do you think that it is ethical to award free items to someone who gives the establishment a high rating? Shouldn't the rating be based on service, quality, taste, value, etc., or am I way off base?