Did google adsense really make $100 per day ?

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There is a lot of e-book selling out that there state about the secret of Google ad sense that can make $ 100 per day, some even more. The money face like me started to wonder is this true, is earning $100 per day just easy as a b c ? Is there any one been buy or try the method the state in the e-book? I'm not asking to provide the e-book just want you to share with me your experience. I just think if really work, why they sell it to people. Some more the price is low, as low as few dollar to less than 50 dollar based on what i see on world wide web so far. As we know there is no free dinner in this world. The concept is easy; let say one day if you found the way to create diamond from rock, will you willing to share it to people? Or just sell this knowledge with very low price...;