There's no set amount of money that you can earn from Amazon Affiliate program but you certainly can earn some good income promoting Amazon Affiliate banners and Amazon Affiliate Links.
I run a blog on a health niche and I use both Adsense and Amazon Affiliate Banners on the health niche blog and I make around $500.00 per month from the Adsense program and then another $1,000.00 per month from promoting Amazon Affiliate products.
I also earn on other products that people buy after clicking my Amazon Affiliate Link or banner even though I'm not writing about those products.
For example I make commissions on car accessories and garden products even though I don't write about those topics.
But the beauty of promoting Amazon banners and Affiliate links is that you earn a commission on the other items that the customer buys from Amazon after clicking your Amazon affiliate link or banner so you can earn a lot of money as long as you have the quality traffic coming to your website or blog.
I've heard of some people after many years blogging and promoting Amazon Affiliate links and banners making $5,000.00 to $20,000.00 per month from blogging and Affiliates.
Some bloggers even earn $5,000.00 to $20,000.00 per month from Adsense alone but they write on highly searched keywords and topics and have a lot of website blog traffic to make that amount of income per month from blogging.
You can earn a lot of money blogging from Adsense, Affiliates and even selling your own advertising space but it takes hard work in the beginning and patience to get to that point.