>> "1. Stepping back, isn't it more absurd that people are, by default, charged more unless they spend significant time dealhunting? The claim is not that the disparity itself is unjust, just that it's time for this to come to an end."

I strongly dislike such tactics since it causes people to waste a ton of time dealhunting, but isn't this usually to the benefit of the poor? These tactics allow companies to price discriminate and charge the rich more -- since they won't spend the time clipping coupons, waiting inline on black friday, or waiting for sales -- and thus theoretically subsidizes the 'discounted' prices for the poor.

On a separate note, what information from my email gets sent to your servers? Do you run a search for "Amazon", "receipts", etc. in GMail's cloud, then only send matching email to your server?