I dont think this sort of advertising would result in a takedown notice either. More likely it would be used as a honeypot or its participants investigated to see what other shady activities theyre involved in. This site though expects the community to take the responsible approach and not encourage or support users who would engage in the advertising of money laundering activities for their own benefit. Is it illegal to advertise? Probably not. Is it unethical and leads to scammers feeling empowered here, in my opinion, yes.
Yeah, it wouldn't be a take down notice. It would be a information request on a particular user or a set of users. I don't think any party requesting this information would have much of a case unless they're already investigation a user that so happens to be advertising it too though. Since, there's no grounds to assume that someone that's advertising is even using the service, and even if they were that they're using it for illegal purposes. So, they'd have to have some suspicion that a particular user was using it for this, and would likely need supporting evidence.
Unless, these services become illegal in the country of the requester. Then, they could investigate for another reason; advertising illegal services.