There are many different ways to make money with a podcast. Depending on your topic and your audience, different strategies may work better than others. 

• Additional Content
• Selling your back catalog
• Turn Your Show Notes Into a Book 

Advertisements Don’t Have to Be Pollution

Selling Advertising on your Website

• Text Link Ads 
• Link Worth
• adBrite (now adroll)
• Buysellads.com

You can but the book More Podcast Money at https://morepodcastmoney.com/buythebook