That explanation doesn't make sense in the current case though. I'd imagine, the usual difficulty in blocking counterfeits is telling them apart from the real product - which you do want people to sell. However, if you already make a point of blocking the real product, shouldn't blocking counterfeits be even easier?

(I could imagine you still have problems with products that just "happen" to look almost - but not quite - like the original, but that doesn't seem to be the case here. The link shows products that look exactly like a Chromecast, even though the actual Chromecast is blocked.)