Title says it all. What is the cheapest product/commission you would consider promoting if you thought you could produce a positive ROI? Reason I ask is that I have an affiliate for my product that has been sending quite a few visitors my way for a few months but with very few conversions. My product only nets affiliates roughly $15 per sale, and I can't imagine he is producing a positive ROI. Any ideas on how he is continually paying for ads day in and day out that are performing so poorly? Adwords credit scam? What is the deal?
PTC traffic? Some untargeted organic traffic? Regardless, don't worry about affiliates sending you traffic, they are the ones losing out on their investment. not you.