I’m very interested in knowing what proportion of retail revenue comes from these types of dark patterns. Is it even possible to come up with a number? If so, I’d be willing to help fund the research.

The other day a friend and I were discussing the “take X% off your entire order” coupons. These seem to be very common, lately. She mentioned that she recent used one on a cart of $100 in items. She expected a $20 discount. But, to her surprise, she only received $2 off. Apparently all but one of her items were ‘restricted’ items.

It seems like many companies find it easier to trick people than to actually provide great service or products.