I've come to the conclusion that eBay don't give a monkeys about counterfeits and, after arguing with them, being told by their "AI" that there's nothing wrong with obvious fakes, escalating, speaking to people, and so-on, I've lost faith in their service.
The fact that they then started adding on a "buyer assurance" (or whatever they call their buyers fees) premium gives me no confidence that an issue with an item would be successfully resolved; either (a) their conclusions would be via the same system as their handling of counterfeit reports and yield the same results, or (b) they've downgraded that to deliberately create a premium "service".
I've pretty much stopped using eBay.