Welllll, it is supposed to be a new in box unused knife that is a collectable so use is kinda not relevant since most collectors wouldn't use a collectable knife.
Since it is a counterfeit you can't know the quality and, frankly, since it is a fighting knife most people won't be using it for anything that hints at quality. They won't be using it as a working knife so they won't find out about edge retention or sharpening.
The counterfeit manufacturers don't care if it is usable. They typically don't heat treat the blades so that step wont eat into their profit. They usually use the cheapest stainless that won't rust and it may not even be able to be heat treated, but it might hold an edge for a little bit. Saves money. See, they don't care if there are complaints about Al Mar quality since they're thieves. They'll just keep making counterfeits until the market is poisoned.
Those that use the an appropriate steel often skip heat treat as a cost saving even then.
Counterfeits where they try to copy the markings and packaging aren't expected for use if they're copying collectable makes/models. Sebenza knock offs are users copying a using knife and those counterfeiters will use less expensive heat treatable steels like D2 that come close to actual use performance. You'll buy a "Sebenza" from an unscrupulous dealer in a "deal too good to be true". Deals too good to be true usually are. OTOH, the endless supply on Ali and dhGate of Sebenza "clones" are never sold for stupid prices. They're selling working clones for 10 -20 percent of a Chris Reeve Sebenza using cheaper, but serviceable materials. A whole different class of counterfeits.
Then there are the counterfeits of collectable Case knives that are remarking or replacing scales or ... more modern Case knives to sell as more collectable much older knives. That's been going on for a lonnnnggggg time and there are pages and pages on those counterfeits.