It happened again that eBay took a few of our products down regardless we offer open-source and open-hardware products under our own band, and saying "compatible with XYZ" in the product title. We know the rules, we know the law, we do this for 8 year on many platforms worldwide. eBay is not correct by taking our listings down.
On the other hand, I searched for the same protected brand name on eBay, and found 16000 results, of which 2/3 use the same trademark in a violating way by just calling an unrelated or counterfeit product "XYZ" without to mention that it is only (if even) a compatible product.