[acuozzo]

1. You can exchange privacy for 20% off.

2. Many franchises have a crummy PA system, so you can avoid this if you plan on using the drive-through.

3. Customization. It's very tedious for all involved to repeatedly request "no cheese", "no ice", "extra sauce", etc. for a very large (e.g., $100+) order.

[ceejayoz]

#3 is key for us. My kids like a plain burger. Order via a human and there’s a 50/50 chance it gets pickles and sauce anyways, so you have to run in and get a remake.

Never happens with apps.