In 2006, the most active sectors for affiliate marketing were the adult gambling, retail industries and file-sharing services.:149–150 The three sectors expected to experience the greatest growth are the mobile phone, finance, and travel sectors. Soon after these sectors came the entertainment (particularly gaming) and Internet-related services (particularly broadband) sectors. Also several of the affiliate solution providers expect to see increased interest from business-to-business marketers and advertisers in using affiliate marketing as part of their mix.:149–150
You may have heard of ClickBank, one of the oldest and most popular affiliate networks. A billion-dollar company, ClickBank specializes in digital products like e-books and software, as well as membership sites. If you are comfortable selling information and don’t want the management and administration hassles of “real” businesses, this may be a good starting point. Its commissions can be anywhere from 10% all the way to 75%.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.