Walmart is known for having ... characters in its stores. Think severely obese woman wearing a bikini. Walmart will let anyone in and anyone includes some wild people because wild people exist.
Costco requires a yearly membership and a contract. If you come sauntering in wearing assless chaps you're likely to get kicked out, your contract revoked, and being unable to ever shop there again.
The comparison being made was trying for a specific audience and excluding those outside of that audience (Costco) vs trying to appeal to as large an audience as possible, which means accepting things that most people wouldn't otherwise accept (Walmart).
Walmart is known for having ... characters in its stores. Think severely obese woman wearing a bikini. Walmart will let anyone in and anyone includes some wild people because wild people exist.
Costco requires a yearly membership and a contract. If you come sauntering in wearing assless chaps you're likely to get kicked out, your contract revoked, and being unable to ever shop there again.
The comparison being made was trying for a specific audience and excluding those outside of that audience (Costco) vs trying to appeal to as large an audience as possible, which means accepting things that most people wouldn't otherwise accept (Walmart).