This has nothing to do with BH. I have promoted many different products through clickbank using msn adcenter (banned from google and yahoo is too expensive), mainly software, ebooks or other non physical goods. And 90% of the campaigns never bring in any profit, so this is what I do with them. 1) Build massive keywords list, remove All the negative keywords. 2) set the maximum Cost Per Click to 0,05$. That is the minimum bid on adcenter but its also my maximum. I spend about 2-3$ per day depending on the campaign (thats 40-60 clicks). And I also make about 1 sale in every 2-3 days ( (25$ average for sale). This system has prooved to be quite foolproof. But you cant do it in Adwords because the CTR is too low and they will hit your bids right up. Im using www(dot)platinumpartner(dot)com for finding products to promote. I have several campaigns running like this, so If you have something "paused" because it didnt bring in then try it. Any positive/negative feedback is welcome!