On BTT, where I come from, scams are not moderated and there I would have tagged the account and/or probably opened a scam accusation on the appropriate board for it.
What should be done here?
I am also teleported from BTT here and whenever I see such posts on BTT I ignore them sometimes because I know they will be removed in a fewer time, and mostly I report them to the moderators, I never opened some spam accusations against them in reputation or other similar boards, because creating a whole thread would be tiresome and time-consuming. And why we should spend a lot of time on creating such topics.
While we can just report that topic or post to the moderators and our work will be completed, as the account will be banned or the post will be deleted after reporting it to the moderators. I suggest you should do the same, try to report it to the moderator and try not to make some long replies under such topics because at the end these topics are going to be deleted either way so don't waste your energy.