Summary:
Spam related to Garcinia Cambogia Extract diet pills also cross-posted to Twitter and avoids spam filters on social networks.
Over the weekend, a large number of Pinterest accounts were compromised and used to pin links to a miracle diet pill spam called Garcinia Cambogia Extract. Since most of the compromised accounts were linked to Twitter, these spam "pins" on Pinterest were also cross-posted to Twitter.
Source: http://www.symantec.com/connect/blogs/pinterest-and-tumblr-accounts-compromised-spread-diet-pill-spam Satnam Narang