may be some users, setup their co-op network with "Use nofollow On Ads", so does it get nothing for us who linked on thats page?, we don't have any value if our link on those page that the ads set as nofollow, we got no backlinks any more. why co-op not remove these feature? so all user get real backlinks and more fair on co-op ad network
Nofollow is there because of all the rumors of Google giving a penalty to the coop's unrelated links that it displays or that's how I understanded Shawn back when it was implemented. I know I was hit by some penalty but I can't say if it was the coop or not but a lot of people I knew got hit that were displaying links but some people were not hit so it could have been some random crap Google was playing with me.