I decided to check my Amazon account. I haven't had a payment from Amazon since 2016.
I do not think they are a trustworthy partner. I was sending them thousands of quality hits a month but never making sales. Very odd. I think they have all sorts of sneaky ways to cut the affiliate out of sales.
I still send them some traffic for stuff I can't find anywhere else.
Indeed, all sorts of tricks to screw the affiliate out of a commission.