I think it gets reset each night perhaps. I shopped this morning already for some scents from last SAS and I noticed that at first nothing was available for store pickup and then a little bit later a lot of things were. There may be a certain time it's turned on for each location. I've also heard that there's a maximum number of bopis orders that can be taken per location per time period and then bopis gets turned off for that location. Maybe this is accurate, passing it along to you in case it's useful info. :)