Click bank has reported in their news:--
We have received reports of affiliates' hoplinks not being tracked on sales, and affiliates not receiving credit for sales they have promoted. We are continuing to investigate these reports, but our findings to-date point to customers that have Spybot Search & Destroy, with ?Immunize? enabled on their computers.
--
Of course they continue:
--
While we are making every effort to understand and address these reports, in looking at our sales statistics, we find that affiliate-driven sales as a percentage of total sales has been increasing from the beginning of 2006, and that rate of increase has remained steady.
--
and
--
We are also researching alternative methods to improve tracking of affiliate identification.
--
Now, the real question is whether this (and/or) other programs are altering the hopid so that a different affiliate is getting credit, or whether they are just messing with "advertising links".
I think it needs a bit of investigation.