GeneVincent - 1:38 pm on Dec 29, 2012 (gmt 0)
Making all your purchases through your own affiliate links its a very worthwile experience. Not for the commission, but because this is the only way to check if sales are correctly tracked or not.
You'll be surprised how many of those sales won't be tracked.
The only recourse is to stop working with those merchants immediately. Talking to the affiliate networks about those cases is usually a wast of time in my experience.