Very high commissions: Most ClickBank products pay 70%+ commission. You read that right. So in that case, if you sell a $100 product, you earn $70. You might think that’s way too high to be real, but it is. They’re mainly able to do that because most of their products are digital, which means there are no “production” costs, “shipping” costs or any other costs that are usually associated with physical products, hence the high commissions.
Webinars are quite possibly one of the most potent ways you can make an exorbitant amount of money online. You'll need an audience to train and you'll need to know what you're talking about. Of course, this usually requires having a website and some semblance of an online presence. However, people can still do webinars without all of that. For example, you might have a sizable social media following and you train them every week on something to do with social media. But you will need a product to embed and sell at some point. Don't worry about it in the beginning. In my experience, the best webinar platform out there is GoToWebinar. 
Summary: ClickBank University 2.0 has a solid course with useful tools to help people create their own digital products, market it on ClickBank and make money. They also have a set of course to guide people in affiliate marketing but the information is limited and outdated. In addition, CBU has a high-ticket upsell which they did not reveal to you upfront. So, take note of that!

And while it will take time to build up a big-enough audience to attract advertisers and other ways to make extra income from your podcast, the opportunity is there. John Lee Dumas interviews entrepreneurs seven days a week for his podcast Entrepreneur on Fire and now makes more than $200,000 a month from it. In fact, John publishes all his income online and showed that he’s made almost $13 million since launching in 2012.
ClickBank represents primarily digital or downloadable products. These typically have high-percentage payouts to affiliates. The commissions average around 50%. You do need to be careful and closely vet all products. There are some great products, some good products, and many crap products. You need to be sure the product and the promotional methods are appropriate for your audience. But ..