Knowing this, many affiliates using the Amazon Associates affiliate program simply use the sales of cheaper items as a way to boost their commissions on the larger items they promote. You won’t be able to sell nearly the number of high end digital cameras as you can e-books, so the e-books simply help to raise your commission percentage when you do happen to sell a $1,000 camera.
Last but not least, affiliate marketing can be very lucrative (although keep in mind that it’s not a get-rich-quick scheme). Since you’re earning a percentage of every sale you refer, there’s no maximum ceiling for earnings either. This means that if your affiliate site takes off in a big way, you could potentially end up making a great passive income.
I personally prefer to do it that way--you can create a more convincing review that's more likely to make sales. It's not always possible or practical, though; for example, would you break up with your significant other just to test a product for getting your ex back? ;-) In cases like that, or if the product is expensive, it's usually best just to use the vendor's affiliate resources instead.