They make a profit by selling donated items for certain.

The people making those donations get a donation slip for their taxes.

The people who sort through the donated items and the people putting those items on the shelves as well as the people running the registers are all getting paid.

I say kudos the the billionaire owner for giving people entry level jobs to get off of public assistance, giving opportunities to people with no other skills for whatever reasons and people with disabilities. Who cares how much profit he makes. At least he's doing some good for others with your unwanted items. Go ahead and say what you like now.