make money hubpages

How much money can you make using hubpages.com?
and do you have to be 18?
I just started using hubpages four days ago. I haven’t made anything yet but I haven’t gotten much traffic. Some people make 10 bucks a month, while I have heard some people say they make a few hundred. I guess the amount you make depends on the articles you write. If you write a review about a $1,000 laptop and someone buys that laptop on amazon.com after clicking on a link in your article you get royalties for the sale, which in that case would be a few hundred dollars.
Check out some of my hubs
http://hubpages.com/hub/My_Thoughts_on_Global_Warming
http://hubpages.com/hub/The-Rise-and-Fall-of-JetAmerica
http://hubpages.com/hub/Americas_Music_Festivals
http://hubpages.com/hub/Places_to_Visit_in_Minnesota
and for your other question, I cant recall if you have to be 18 or not for hubpages, but in order to make money through Amazon Associates or Google Adsense you may have to be 18, but i’m not entirely sure.
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