LinkConnector has struggled to stand out from the pack but nonetheless has managed to sign some exclusive deals with big name brands, including Writer’s Digest, the Disney Store, Ironman, Hats.com, and Everly. Their strictly controlled screening process for both merchants/advertisers and affiliates/publishers means that you can always rely on the quality of products on offer.
You can sell your ebooks through Amazon's Kindle program or Apple's iTunes Connect, which gives you access to a large majority of the digital-book reading market and the barriers for entry are incredibly low. You don't need to invest lots of money to make this happen, but you do need to invest lots of time, not only in writing the ebooks, but in marketing them as well.
Now most affiliate programs have strict terms and conditions on how the lead is to be generated. There are also certain methods that are outright banned, such as installing adware or spyware that redirect all search queries for a product to an affiliate's page. Some affiliate marketing programs go as far as to lay out how a product or service is to be discussed in the content before an affiliate link can be validated.