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Therefore, you have higher chances to trigger certain "flags" of the click-fraud detecting algo.
just my 2 c...
Valid clicks MINUS Invalid clicks = BALANCE OWED
If you have lots of invalid clicks, then significant portion of your payment may be deducted by Google.
Well, at least that's how it should be, but in reality, if your website receives invalid clicks, your account will be disabled and Google will pay you $0 and 0 cents.