There is no point cloaking, used to think it helps, but it doesn't. Spyware target cookies at point of purchase and all those afsrc=1 are bull#*$!. You expect thiefware authors to be ethical?
On the merchant's site, on the final portion of checkout, the spyware initiates a popup that overwrites your cookie with theirs.
Your course of action if your current merchant doesn't coverts well, drop them. Big names doesn't mean they convert well because those are the favorites for spywares to target.