You already had an existing site that was getting good traffic and just decided to stick AdSense on for the hell of it, and starting making decent money from it. Basically the exact opposite of an MFA site. I had a site selling some products, and was getting about a thousand uniques a day. Stuck AdSense on it, and somehow (coincidence) the sales of my product increased, AND I started pulling in consistent AdSense cashflow. Ironically, the couple of MFA sites I've tried to start don't even come close to what my "accidental" AdSense success site is doing. Anybody have similar experiences?
It is kind of normal what you are saying isnt't it ? But if you get those MFA sites you made to receive the same amount of visitors as you "accidental" website those would be success too....
I think the main reason is because MFA sites don't receive any returning visitors, while your other site is probably also revisited and linked-to by your visitors.
Quality is always best. That is why Google, Coca-cola and other leading brands in different industries are leaders even if they charge higher prices.