What is the most that you have lost on a website?

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What is the highest amount of money that you have lost on a website? I ask this as I read of the number of scams out there. But I have been cheated by what I feel was quite a big company. I had links fom them on my website and they were being clicked regularly by visitors to my site I now tried to log into my account to see my stats and was unable. I have just received an email saying that they have closed my account and I am not allowed to appeal