Above are going to be the updated Amazon Associates Program fixed commissions rates. What a disappointment. Amazon has cut and capped rates of commissions. The commissions used to increase (from 6% to 12%) with the number of sales. Now you may get as little as 1% commissions in a lifetime depending on your niche.
They have also removed the variable rates from their affiliate program which allowed high volume affiliates to earn more money as they saw a higher volume of sales.
Here is the former affiliate compensation structure at Amazon just for a comparison (pre March 1st changes). This slashing and fixing of rates is a reminder to affiliates not to put all the eggs in one basket.
You can read more about Amazon's new rates on this link:
Amazon Operating Agreement - What's Changed (effective March 1st, 2017)