I’d stick with Amazon if I were you. All of my Amazon sites only have Amazon affiliate links. If you use Google Adsense display ads on your site, you’re literally taking people away from your site for the sake of just a few cents with these type of ads. If you direct them just to Amazon, then you have a greater chance of earning more money from that click.
As you probably guessed, the scale of strategies behind promoting Clickbank products is much larger than the ClickBank itself. One thing you must understand is the fact that you need to choose your strategy based on the product, not what you know. Every product has a different audience and every audience requires a different approach, that’s why if you want to become a super affiliate on Clickbank, you need to learn these different strategies and choose the right one based on what you promote.