What Anchors do you use when you hit the buffer site with links from Scrapebox, Xrumer, SeNuke X ? The buffer site anchors will be the keywords you are targetting...so do you use these same anchors when hitting the buffer site or do you use any anchors? If yes then you are also optimizing the buffer sites for these specific keywords which means they could outrank your money site?
Do you hit the specific post of the buffer site or the buffer site "MAIN URL".
For example do you hit
http://blogg.tumblr.com or
http://blogg.tumblr.com/post/2012/post ?