This is a value judgment. You're assuming the author is scheming an elaborate way to be dismissive of poor people. You just split the entire world of coupon us

This is a value judgment. You're assuming the author is scheming an elaborate way to be dismissive of poor people. You just split the entire world of coupon users in 2 arbitrary sections. That's another value judgment. There are many other reasons to use coupons. Such as: I like a good deal. I like to use coupons. I wanna try something new. I am bored and want to cut coupons. I got this coupon book. This place opened and I'm not sure I wanna try it full price. Etc. There are so many ways to explore this question. As for "worse customers", it is entirely possible for a customer to be bad, and for it to have nothing to do with being poor. I recommend studying the user journeys of user cohorts motivated by external rewards, vs those who aren't.