I hate social media manipulation because it's insidious; you often cannot discern the difference between a sock puppet and a genuine fanboy. But it's fun trying.
Consider this recent post on KVR:
Received an e-mail about this crazy promotion Crysonic is having until friday. Almost didn't believe it but it turns out it is real. 98% discount on their plugin bundle. HURRY. Really a no-brainer!
http://www.crysonic.com/plugins.html What do you think? Sock puppet or somebody just trying to get the word out?
HINT: it helps to know some history about the particular company being touted.