It looks like the links get pushed off the first page in a week or so, and I don't think they pass any PR once they are off the first page.
But for the people who have had trouble finding an entry point into the spam community - this is your gateway.
hmmm.... quite valid point but when ever any one click on all comments, I think our link will be displayed on a PR7 page so is it necessary for a link to permanently show on a PR page