[001sky]

Walmart's biz model is to be open 24 hours. Its stupid to kick out people in the middle of the night who are going be be shopping during the off hours period. People sleeping in a walmart PL are not there taking up space in isle 7 during rush hour shopping hours. So, from that point, its a ratinal thing to do. But also from a cultural point of view, its more common than you think, in remote areas, to need to come in to resupply (with say camping gear, food, clothes, etc). And if Wally world can save these people (like hunters, campers etc) 100 bucks for a hotel, they're probably going to increase the chances of them spending that 100 bucks inside.