In the time it takes you to cycle through a 1000-person line, you can hit at least 2 or 3 Walgreens, right?
Only a few of the Walgreens actually get variants, and they sell out in 15-20 minutes. You can't hit more than one and score variants (unless you are extremely lucky). This is true of almost any store that gets variants in on BF.
Most Walgreens do not announce when they go on sale, it's just when the shipment gets in. Except for the infamous case last year.
Most of the time in that 1000 person line is prior to 9am before anyone is open anyway, you can get through the line by 10 am before many other places are selling it (lots of noon releases) or have even receive their shipments.
Lots of smaller stores that got good shipments in 2013 were shafted in 2014 with no variants or just one variant.
I waited at a Suburban Binny's with only 15 people ahead of me, then immediately drove to two nearby stores, both of which got Prop in... too late they sold out of Prop in 10 minutes and I was there about 20 minutes after 9am, they only had regular left. The allotment I got at that Binny's in the first 20 people was less than if i was 700th in line at LP Binny's.
Driving around you can find lots of regular, variants you have to be there either when the store opens or when the shipment gets in, even in the burbs.