Sure, and I think customers care. This customer clearly cared.

But suppose some customers don't currently care about you doing something manipulative or exploitative to them. Is that a sign you should keep going?

I say no. That not everybody has yet wised up to your exploitation isn't a sign that you're safe. The fundamental basis of commerce is a positive-sum creation of value for both parties. Whenever a company drifts away from that, they're skating on thin ice, and they will eventually fall in.