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It was mentioned in the post that only a bare minimum first version was released, don't know if you saw that. This first version is for testing purposes more than anything and it needs such a disclaimer.

It is planned to add features like escrow, reviews and so on, which will add protective layers for the buyer and alleviate the need to trust the seller.

I'm not super familiar with escrow operations. Do these give you all that is needed to build trustless platform on Hive? If I understand it correctly it still requires 3rd party agent for arbitrage.
AFAIK you'd normally build such a platform using smart contracts, but Hive doesn't have them.

The escrow operation uses a 3rd-party agent but the agent doesn't hold and can't steal the funds. The blockchain itself holds the funds and the agent can release the payment or issue a refund. You can read more here.

So instead of the smart contract holding the funds, with the built-in escrow the chain itself takes care of it.