I'm just an affiliate, but the way I see it is, I'm helping them get more sales through organic search, and I'm getting payed nicely for it
You see, Amazon rank pretty OK for everything really, because of the power of the domain...but not amazingly well.
So I pick popular products, build a small website for a particular group of keywords and then using a very simple seo strategy (build a few links using a few different sources) I rank within days, if not weeks tops.
I love this model, because I've got it to a tee.
I spend most days trawling Amazon looking for new products.
Every week I build a new site, sometimes 2. I have over 30 now, generating a nice monthly income.
Just one crap website keeps making me about £50 a month. It took an hour to make.
My point is, find a strategy and stick to it, just for the sake of it. That's what I did. It was painful. I thought I was missing out on other stuff. But I humoured myself and stayed with a strategy that was making me next to nothing, and turning into a near enough full time income within months.
Think, what small amounts of money have you made online in the past year? Could you multiply your efforts using this one strategy/niche/process and make more?