I doubt many would leave Amazon permanently because of a service outage, but it probably does cost them something in impulse purchases, if the impulsive desire for the item passes during the downtime.
No, you would think that, but actually if you read the comment referenced above, what they actually found is that outages seem to have little effect on revenues. That's why it's so surprising, really. The implication seems to be that their customers don't actually spend a whole lot on impulse buys.
