unless its some countries cops/feds (or even journos or would be vigilantés) running the site to find out who is stupid/blatant/stubborn enough to try and set up a deal..
I remember in the 90s how the Cook Report (a “investigative journalism” show from the Midlands) organised a fake rave and then got these dealers to say “we will serve up at your party” and then dobbed them all in…
it’s a search engine that answers to anything. same way whatever you google for e.g. gay sex will have a link saying “buy gay sex on ebay” (well not that one, google ads fixed that error last year, but many other silly phrases will get the same result!)