martinibuster - 7:09 pm on Aug 3, 2011 (gmt 0)
I think RF is referring to affiliate parasites [webmasterworld.com]. They are toolbars and other software that rewrite affiliate codes in browser cookies to insert their own ID, thus stealing your affiliate income.
Many years ago one of the big affiliate companies held a contest to award cash to the affiliate who earned the most. The first prize winner was disqualified because, as I recall, they were parasites. The second place winner was also disqualified and as I recall, so was third place winnner. At around this point they decided to call off the contest. I believe the thread discussing this was in the Supporters Forum, around 2005 or maybe earlier.