Two of three keys, held by three different parties. It is why a stranger ships to you first.
Escrow is the reason somebody you have never met is willing to ship before being paid out. On BlackOps it is 2 of 3 multisig, which means the payment sits in an address that needs two of three keys before it can move.
You hold one key, the vendor holds one, the market holds one. No single party can move the money alone. The vendor can see the order is funded but cannot reach it, and the market cannot quietly reassign it.
You fund the order and the coin locks into the multisig. The vendor ships. When the package arrives and matches what you paid for, you confirm receipt, your key and the vendor key release the payment, and that is the whole transaction.
If nothing arrives, or what arrives is wrong, you open a dispute instead of confirming. The market key becomes the deciding vote, and staff weigh what each side can show against the vendor record. A seller with a long clean history and one with a bad month do not get read the same way.
Finalising early means releasing payment before the goods arrive. Some vendors ask for it. On a seller you have not dealt with before, agreeing hands over the coin and deletes the dispute route in the same click, and there is no way back from that. Confirm receipt when the package is in your hands and correct, and not one step sooner.
blackops5l63qnwnmlnsfvtlu66md3x3vp3fdtpna42eq7ozujr67hid.onionblackops6kignp3eddmvqcfkjzf6qr6haxbmkypc2xtqlnhuu4ak4dqd.onionblackops27m32abqvbhnyswgazqawxqbznbzkkkv5sjo7gve2ndpsdad.onionBefore you sign in. Open these in Tor Browser only, and compare the onion printed on the login screen against your address bar. If they do not match, close the tab.
The deposit itself is dull. The routing before it is where the care goes.
A clone can copy the design perfectly. It cannot show you the real address while living somewhere else.
Three addresses, all reaching the same market. Which one you take does not matter, but where you take it from does.
The missing Bitcoin option is the point rather than a limitation, and the reason is what a public ledger keeps.