Polo7back has been banned in the last month, so the moderator already notice him. I will report this topic to make moderators aware, if they're all alts, they all should be banned.
I'm not sure if we can say they're low quality posters because their topics still exist in Economy and didn't get locked. But I understand, most of the discussions are full of conspiracy and sometime not make sense, however we can correct them, just like when people didn't really understand with Bitcoin, then people who understand can correct it.
The good thing is those posts are created by humans, not AI.