Since March 2017, you may have noticed that Amazon.com changed the commissions (for the worse,of course), so now you get a lower percentage. Since I have a website in the computer niche (I know, I know...), the percentage dropped from 4% to 2.5%, which I have already saw as a drop of about 30 percent in revenue. So, if you want to start a new Amazon website, be aware that you will have to work your ass off for a lower percentage than before.