With the new eBay affiliate program, you can now see the hub that was the source of each of your sales. Go to Reports -> Transaction download, and then download the excel file. Under the customId column will be the url of the responsible hub (if you add hubpages.com/hub/ to the front). Hopefully that will help you big eBay seller's fine tune your hubs a little. So far, across HubPages the revenue seems to be very similar to what it was under commission junction.