I use Popshops and put some ads on my sites via php. One of the options that I have in Popshops is to: Add rel="nofollow" to all pagination links Do I want to do this? Will it help me rank higher by not giving the site, to which I am an affiliate, some additional rank?
it's better to use nofollow on duplicate pages. as i understand , the pages you mention is not duplicated pages
only if its pages you dont want to get spidered. I would manually try to add the no follows only to links that you don't care to give pr to.
I added no follow tags to my affiliate links. yes it will rank you higher coz you are not sharing your PR to your affiliate links.
Ya nofollow save some PR juice and PR not distrubuted in other links. But it is useful if you have duplicate content and for the external websites