I sell an item on Amazon that I make. It's very simple, not wildly popular or profitable, and has my brand on it (trademark is in the works)
Another seller hops on the product page I created, shipping from China. Google around and learn that I'm supposed to do a test buy to see if it's counterfeit.
Do a test buy, wait ~20 days, get a package with a similar item but totally different packaging and branding.
Okay, cool, obviously fake so let's contact seller support and get this straightened out.
Seller support emails the seller(?!) asking them to provide me with a refund, (which surprisingly they do) and take no further action.
I write in to seller-performance@amazon.com, no response.
To this day, he's still selling on Amazon, but seemingly randomly left my product page a few weeks ago.
I'm told once you have a trademark, Amazon actually takes action, but I was also once told that a test buy is all you need. I'm glad I don't depend on Amazon for my income.