its really really hard. Most of my time with my site has been getting it to work right. which for the most part I have alot of the issues worked out. Next, is getting users to create accounts and content on the site. but you can get by, by just creating fake users to create content which I have been doing. last is figuring a way to make a profit off of it which I am working.
But, for me if I make money I make money its more about the challenge of creating and designing the site.
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http://www.spiffiedeals.com/