I would suggest sending a PM to the accused account, if they respond that they will stop cooperating with the scammers, all good. If they dont I suggest opening a flag on the accused.
I addressed the issue in their ANN topic, so it remains to be seen if the OP replies. He was active on the forum today, but I'll give him another 24 hours before tagging his account.
I think it's safe to start proceeding with the negative tag. I tried to reach them via their TG channel and they removed me right away. I don't think they'll heed the invitation you put on their thread
One of main things that I did well in my life is removing negative people from it. Trying to spend the time just with positive and good will people. In a crypto world there is a plenty negative people, that are spreading negativity in the group to others. From one side its good that you posted info there so we know what is happening here. On the other side you can light the fire with negativity on project that didnt started yet. I didnt lose 6 months on coding to have negative comments before start. I have personally told to mods to delete all the fuds from the group. Some of them deleted your comment too.