I used to do well with Ebay Partner Networks, but Ebay changed the way the affiliate program works and it is near impossible for a small site to make money with it anymore.
I have been tweaking my EPN plugin trying to find a way to make money again, but my sales have been zero for a couple of months in spite of thousands of clicks. I thought it might have been something I had done so I opened a new account under a different name and email, but there was no difference. I cancelled the account after a couple of weeks.
I googled the problem and discovered that it was an issue with ebay timing their cookies to a limit of 24 hours.
My latest tweak is to only show auctions ending in the next 24 hours. This way any purchase should qualify for a commission. I also changed the product landing page to the actual auction page rather than the waste of time summary page that their RSS feed uses.
I installed the plugin on 5 sites and I will watch to see if it makes a difference.
UPDATE**************************************8
Three days later – averaging 3 or 4 dollars a day after months of zero. I think I have the formula.
So far only low $ sales, but I expect from time to time that some big ticket items will bump up the average.