It is the same spamming ring. Yahoo issues them multiple ID's that they use to post, bump and rate their own scam messages. Supporting cyber criminals is a free Yahoo service. It doesn't take many suckers to make this whole scam profitable.
Understood that there are paid spammers, but how do they get and justify paying 11 different ids to like one post when no one with any sense will ever click on it? How can that business model make any money?