One of those loopholes is that sellers are advertising "Middleman Services" but appear to have no real intention of using Middleman Services, simply posting it to gain buyer trust or convince them later to pay directly. This is now prohibited. If a seller is going to advertise middleman services, a link will need to be posted. All Make Offer Listings don't need a middleman link as they are asking for bids so this will be the only exception.