It's possible that their stores are deserted on black fridays because everyone is at electronic stores/malls/etc (and it's late Nov, which might be a low point

It's possible that their stores are deserted on black fridays because everyone is at electronic stores/malls/etc (and it's late Nov, which might be a low point during the year anyway)... so they operate at a loss on that day and could save money by closing. Same reason stores close at night.. not enough customers to justify running 24 hours.