There have been multiple accounts created with the sole purpose of posting advertisement posts or replies containing unsolicited advertising.
Accounts which solely post advertisements, or persistently post them may be terminated.
smik , 6 months ago Link to the source blog entry. It has more information on how the malware went undetected and how it worked.
Link to the source blog entry. It has more information on how the malware went undetected and how it worked.