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And if we assume that you are 40 years old (don't correct me if I'm wrong), and have been buying yearly since your 20s, that's a factor of 20 to account for duplicate owners (well, you may be their best customer, so that's an upper bound on the factor).
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My recent order number was 61041 so presuming that means 60k orders, that's a ~10% review rate. I'd expect closer to 1% so you may be right.