Consumer psychology

I signed up for Amazon Prime because they're offering a free month's trial.

Anyway... yeah. They got me. It really does make you buy more. Even if I paid for a year's membership, I think it still would, because I would quickly start saving money (especially since Prime does 2 day shipping, which I normally don't bother with). Oops.

(OK, I don't necessarily buy more period, but I'm more likely to buy it from them.)