If "awkward or uneven grammatical phrasing" is supposed to be a clue, then 30% of the ads on this site would be suspect. Many of those who list, including retailers, are unable to spell, or write a coherent sentence.
One example would be your post. What exactly do you mean by "rather esoteric to understand"? If there is an ad that you know of that you think is a scam, please let us all know what it is.
One example would be your post. What exactly do you mean by "rather esoteric to understand"? If there is an ad that you know of that you think is a scam, please let us all know what it is.