This time it is PostJoint- the second guest blog network after MyBlogGuest has been penalized for distributing paid guest posts. Matt Cutts confirmed on twitter that Google has taken manual action against PostJoint who claims to have zero footprints.
In his tweet, Matt Cutts writes “any link or guest blog network that claims to have “zero footprints” is waving a giant red flag.”
PostJoint has confirmed the penalty, and explained it as a manual penalty. Though there is no confirmation yet, it is believed that blogs participated in the PostJoint network are also penalized, just as the ones involved in MyBlogGuest.