Full disclaimer: I've made it no secret that I do not like KZ as a company. I have not liked them for a long time because, when I first got into the hobby, KZ seemed, to me, like an exciting opportunity to purchase increasingly better sounding audio products at very low prices. After purchasing a few models, I came to the conclusion that they were mostly identical sounding or suffered from some very harsh or unrefined tuning. As reports started emerging of how misleading some of the claims about their products were: drivers that were present but completely inaudible, unrealistic performance claims, increasingly higher prices without any noticeable improvements in audio quality, I moved away from the brand and never looked back.
Despite my opinions on the company, I hope that some of you here can acknowledge that no company, regardless of how much you like it should ever pay reviewers to review their products. It creates a glaring conflict of interest, it's against the Terms of Service and the Laws of many countries. It should be something that most of us can agree is a very crappy thing to do. Regardless of how much you like KZ products, I think we should stand united against this practice.