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.
Be Clear on Tactics and Strategies: You don't want to cannibalize your affiliate program with your own marketing tactics. Keep in mind that affiliates drive a lot of their business through search marketing. If you are both competing on the same keywords, this can often cause issues. For example, if you don't want them to bid on your brand terms be upfront about this at the very beginning of the program.
If you’re looking for great examples of people making good money on ClickBank, check out this post by AuthorityHackers as they detail the strategy they followed to make thousands of dollars on ClickBank every month. Warren Wheeler of AMNinjas also recently wrote case study explaining how he was able to bring a brand new affiliate website from $0 to $300+ per day in less than 3 months with ClickBank. Both of these posts discuss relatively different strategies. I’m actually going to get into both of those strategies as well as my recommended path to follow for beginners (and why I think beginners should follow it).