Followers of turnkey internet business
You can look at your different campaigns and compare the results you get by using affiliate software. Your campaign reports can give you insight on your clicks, sales and conversions. You will be able to easily see which campaigns are generating sales and which ones are not if you use affiliate software to track it. Maybe your Overture campaigns is doing horribly compared to your Adwords campaign? You can then make changes and improve which ever campaign is doing poorly. Then use your affiliate software to find out if your improvements worked or not.