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I have had two Amazon stores (on two separate sites) since early 2008 and to date I have not made enough for a payout – I’m about half way there. The referral fee is so low, it drives me crazy. I get a lot of traffic and my sites have the potential for high-end items, but the items offered through Amazon in my niche are lower end and therefore lower priced. I utilize a few widgets on other websites, but again the same issue. Amazon is my least favorite affiliate program due to their low referral fees, but still worth it. After all, any earning in excess of my expenses is worth it.
The amount of money you can make can depend greatly of you budget. If you have a small budget and you don´t have a lot of money, then you have to start with free marketing methods like article writing, blogging, forum marketing and such. It takes a lot more effort ant time to have success with these methods. But they are very effective if you keep writing articles and participate in forums. You can make $100 a day within just a few months just with article marketing.