If it’s working for you, then just great. Move on. If it’s not, read on.
I recently read a forum post by a person who gave some statistics of her site (I don’t want to give the name of this person or her site to protect the identity). Per that post, she averages about $400 a month being an Amazon Affiliate. If you are an affiliate you would know how lucky you got to be to make that kind of money per month! I mean, at about 8% commission, that translates to selling about $5000 worth of stuff.
Then, she mentioned her AdSense profit. Take a moment and guess how much it is. I will tell you in a moment.
Google has a referral plan. You can see their referral fee at
https://www.google.com/adsense/support/bin/answer.py?answer=25889
Referral fee, unlike cost-per-click, is paid only if the person who clicked it actually takes an action. If AdSense itself is really that effective, why would Google choose to go with a referral program (cost per action) and not with the CPC?
Now back to the amount the woman makes per month through Google AdSense. It’s $7000.00. Yes, that’s right. It’s a whopping seven thousand dollars. Obviously depending on traffic a website can make even more. The number $7000.0 alone by itself would have been meaningless. What makes this information important and interesting is the fact that it can be compared against the money made from Amazon affiliate program.
Whether you are advertising on the Google’s network (AdSense) or on the Search Results, it probably doesn’t matter (though, it would be nice if there are any statistics on how good the conversion rate is with one vs the other). If it’s not working out good for you, you should try out the cost-per-action option. When doing CPA, you should do this through Google or any other search engine, as well as offering your own affiliate program (ofcourse, be honest and don’t screw your promoters).
If you have any statistics that compare two different revenue streams or customer acquisition channels, feel free to post here to help others make better decisions.