Cross posted with you CassandraW.
If we click on an ad they get money, depending on the arrangement. Sometimes if is just how many views the ads have, sometimes if we click, and with Amazon, it used to be only if we make a purchase (I don't know AW specifically, their arrangements, just blogging in general).
In 2007 before I shut my blog down, I was making about $1 average per click, and with 10,000 visits per month, some click throughs, averaged about $100-$200 a month Google Adsense. I figured I could do that again another time. Oh to turn the clock back and have kept it going... Haha
But I understand it is much lower now, at least what I hear (I have not added Adsense again yet to my new website blog). I know it can be just ten cents per click even.
Anyway, no answer about AW specifically, but yes, viewing, clicking and/or purchasing from the ads helps AW somehow depending.
ETA: but I had Amazon in 2007 and made zero dollars in profit, mine was all Adsense. I wonder now with all I purchase from Amazon if it is better for blogs? I have not looked for it here, but happy to purchase through here if I can.