Cost per click was more common in the early days of affiliate marketing but has diminished in use over time due to click fraud issues very similar to the click fraud issues modern search engines are facing today. Contextual advertising programs are not considered in the statistic pertaining to the diminished use of cost per click, as it is uncertain if contextual advertising can be considered affiliate marketing.
Unfortunately, the 2Checkout dashboard is a bit limited in scope, making it difficult to get any metrics on conversion rates or even sorting by commission payouts. The workaround is to go to the Avangate store, which does list their best-selling products, and then search for these on the affiliate dashboard. That being said, 2Checkout does offer products from more than 4,000 different vendors, making it the leading affiliate network for software and digital products.
Better yet, you can even upload your own book to one of the world’s largest book sellers: Amazon. With Amazon self-publishing, you set the price, retain the rights to your book, and get access to Amazon’s massive audience. For every sale, you keep 70% with Amazon taking the remainder as a fee. If you want to get started, check out Leslie Samuel's great guide to selling eBooks online or follow Tara Gentile on CreativeLive as she shows you how to use your existing body of work to write an eBook within the next week. Who knows, you might just write one of the best business books of this year!