We wouldn't tolerate a business advertising "up to 90% off" if there doesn't exist at least one item that is 90% off. Businesses can't point to an item that is

We wouldn't tolerate a business advertising "up to 90% off" if there doesn't exist at least one item that is 90% off. Businesses can't point to an item that is 30% off and claim that 30% off is a subset of 90% off.