I see those spammers a lot on the Nexus -- but they all have different names and profile pics. They must have a team of them or the same one keeps changing accounts and creating new ones.
"Changing accounts and creating new ones" has been used by corporations and governments, with advanced, automated tools that generate "personal" details and create suitable activity for "pre-aged" accounts that look like human beings. I wouldn't be surprised at garden-variety spammers using simpler techniques in the same class.
(This article is about astroturfing for drowning out real people in web forums, to promote pro-corporate policies.)