Na, I'm poor, and I'm not going to feel bad for getting some bulk household essentials at a significant discount today.
I get not wanting to participate in unnecessary consumption, but this classist view that everyone can afford to ignore big discounts on items they actually need (which definitely do exist among the other noise) is just another high horse people need to get off of and instead focus their energy fighting the system that leaves people desperate for discounts in the first place, not on telling those people off.