Robert_Charlton - 9:14 pm on Sep 23, 2010 (gmt 0)
What martinibuster, randle, and others say above. It's beyond tacky and greedy... it's bad strategy.
From this discussion back in 2007...
Client links to SEO - Yay or Nay?
...a few comments...
I think a link to an SEO website is unnecessarily painting a bullseye on your clients' sites. I never publicly associate clients with each other or with me, and SEO links would do that.
Also, I think it may cost the client some credibility with searchers who find them, at least with those searchers who associate top position with the best companies. You don't want to undermine that.