[Duncan Solvent]

I expect McDonald's have worked out exactly how many times a day their customers can eat there before the ensuing death rate would begin to reduce the company's profits. The actual number is probably lower than three times a day, but that's just my guess. I'm sure they're well aware that they can milk more money out of someone who lives to 65 than a 600-pound gastropod whose heart explodes at 28. The one who dies at 65 is also in a better position to breed and teach two generations of offspring to eat at McDonald's, providing further profits.

The tobacco industry probably led the way in this kind of actuarial calculation.