Forum Moderators: DixonJones
You are studying your traffic logs, right?
Then, once visitors visit your site, what are they seeing? Does it inspire them to buy whatever you've got, or is there something about the design or lack of useful information that inspires backbuttonitis as they seek a better site? Have you checked if they're clicking through to buy things? Looked at the path they follow through your site? Did you implement your affiliate codes correctly? Tried buying something yourself to see if you get credited properly? How do you know people are buying things from your site?
Before assuming that someone else is stealing all your riches, have a good hard honest look at your own house. A good way to start is to ask a couple casual acquaintances to look at your site while you observe. Don't tell them anything about the site, and don't say anything while they're poking around it. Just observe. You may find observing frustrating, but it will be educational. Then, instead of explaining to them how they don't use the site the way you intended, fix it so it works the way people expect.