Relatedly, there seemed to be no acknowledgement of the possibility of dark incentives: many businesses have found they can increase sales by removing pricing details so that prospective customers get deeper into the funnel and end up buying because of sunk time costs even though they would have preferred a competitor. Example: car dealerships make it a nightmare to get pricing information online, and instead cajole you to email them or come in in person. In other words, a calculator makes it easier to comparison shop, which many businesses don't like.

I have no idea if that's a conscious or unconscious motivation for this business, but even if its not conscious it needs to be considered.