[masraum]

Originally Posted by john70t

If there is less activity on someone's credit card, these types of sales might become commonplace and tailored to spur an individual back into making purchases again.
(That would require a fair amount of coordinated personal tracking, though.)

That system of "different prices for different people" might become biased to an extreme.
Any system has the potential for extreme abuse.

I have very little doubt that individual pricing occurs. When automated by computer, it's not that hard. I'm sure there are all sorts of predictive algorithms and limits for it as well.

When you're as big as Amazon, an adjustment of a few cents here and there can make a big difference in the long run.