AFAIK, all of the participants of LIVECOIN CAMPAIGN was added to the list of yahoo62278, maybe he already removed them from his blacklist having some fairly conditions.
They are still included in the list, but new accounts got added into the campaign which is not yet reflected in "the black" list of yahoo62278.
Besides some of those users weren't just spammers perhaps they just want to have some money on their pocket, well yah know, a call of nature in times of their need.
No, probably not spammers. But they are supporting and promoting a scam.