It’s accurate. I’ve been playing the system for years. It even works with “pickup” orders. For example…. I have stood outside McDonald’s, ordered on foodpanda, walked in and picked it up for much less than ordering at the register. It’s a crazy business model, but I like it.
For groceries, I will usually limit my order amount in order to maximize the capped discount. Sometimes, late at night, I’ll make multiple orders from 3 different 24 hour Tops stores (Ekkamai, Thonglor and Phrom Phong) and save ฿500+/- on a ฿2500ish total order.