Well, it could also be an account hack and the opening post was not deleted by the actual owner. It doesn't really make sense to just remove the opening post if it's a scam, then it's enough for the owner to simply disappear, also because the post and full thread is still and will be still available at archive.org and Google Cache.
It it would be hack, i would find it odd that they would just remove the text and didn't put any message in.
But what i find weirder are all these newb accountsjust repeating nonsense. Surely decent is not paying for some service for pumping the thread, especially for low quality like that.