So you never seen any of the advertising for the wts on behalf of escrow discords? It was 95% of trade chat and 80% of m+/raid finder groups. Those listing them never had a group it was 100% advertising with a discord link - i know players that hit a io rank and could earn more for being part of a carry run, they stopped doing the runs and just started advertising because it made them more gold.
This is why the trade services channel was addeed - to remove the constant spam from lfg/trade chat.
You can still use an escrow service - you cannot advertise it in game.