It is kind of weird and new, nothing I've ever used or heard of, and I put 20 things in the mail everyday and pickup brown pkgs at work.
It took a few times for us to really get it, too. It gets easier if you've got recurring things like 20lbs rice, 20lbs beans, 5 pounds dried apricots, dried blueberries, 5lbs wheat flour, and 5 pounds sunflower seeds. You can even choose if you want it every six weeks, with discounts offered on certain items if it helps fill every last square inch.
If you decide you don't want to change drop points, you can delay your order until that driver will be there generally on the same day of the month you always get stuff.
If they don't have enough to fill a truck or van, they'll offer coupons and bonuses. So if 3 of us with small orders want a drop point at 8th and Main, but they needed 10 medium orders to make it worth it, they'll offer 5% then 10% off until the three people inevitably choose a drop point that'll be there in a week or less. Usually the ones offered are already mostly filled with orders.
If say, one guy insists on having it his way, and not change anything, a final warning will come 3 2 and 1 days prior that they're automatically bumped to a new drop point and they can get their goods then.