CainIV - 5:01 am on Nov 21, 2009 (gmt 0)

Creation of thousands + of stub pages for the purpose of gaining traffic and selling ads (no content, only optimized titles and ads

Thin affiliates (websites without unique content or purpose)

"3 way linking"

This might not be accurate enough. I would suggest that "3 way linking for the purposes of developing one way inbound links" is a better way to frame this one.

There are many times I have given a link from one website which benefited the user, in exchange for a link back for another website which was much more useful for both my consumers and the user.

It is the intention behind the link that often draws the curtains of the overall 3 way game plan.