Vedis asked about my experience with Commission Junction. Well, about a year ago, I did experiment with Commission Junction. I placed a few relevant products on my parenting site but I didn’t get any income for a couple of months. In the end, I took it down.
I have also experimented with Amazon associates on my food blog. I displayed some cookbooks and crockery but again, nothing materialises. With Amazon, you can even open a virtual store. I did that too and as usual, nothing. Big fat zero.
Both of these are based on per sale basis. We get about 20% to 35% commission if the visitor clicked and buy the products. Unfortunately, it is not easy to sell stuffs this way. Moreover, the Amazon ads are ugly, i.e. they are either too small to make any significant impact or they are too large and too obstructive. As for Commission Junction, the products are not that attractive as well.
My verdict is not to place too many types of ads on one page. I have seen people place Auctionads, Chitika and etc along with their Google Ads. This will greatly reduce your income because if they go over to those ads and did not make any purchase, you have lost out on getting Adsense income as well.
So, select your ads wisely and make sure they are there for a purpose and not just to clutter your site. Advertisers, readers and surfers alike hate a blog with too many ads. I hate that too. :P
BTW, I have also been accepted into Kontera but I doubt I want the inconveniences of blocking my ads on each paid posts. So, I will just stick to TextLinkAds, paid posts and Adsense.