Although the use of such thread bumping/spamming methods in promotion is not enough to confirm scam, it definitely gives another negative sign.
Especially when the projects they were previously hired by were also scams:
But once again, I sincerely want you to take into account the history of the company and its development well before the current crisis.
If you are experienced and reputable company, why did you hire that "marketing agency" (as they like to call themselves) to fill your ANN thread with all those newbie sock puppet accounts, writing ridicoulous one-liners that won't fool anyone but will bring you attention, albeit not the kind you wanted. These kind of services are ready to promote just about anyone that pays, and same accounts that are "working" in your thread and promoting known ponzi schemes like Goldario, among others.
I have no idea how they managed to sell you this, but it doesn't look good, and it's something that is frowned upon here.
Rikafip already researched it and called them out, that guy is an animal.