Stop in for a cup of coffee

One of the weird things I see in VN, is they order a lot of stuff online, including clothes. It gets here usually within a day, probably better than Amazon. But the wierd thing is, and I've seen this many times. The delivery driver shows up at the gate, and rings the bell. NO MONEY CHANGES HANDS UNTIL THEY UNPACKAGE THE ITEM AND CHECK IT!!. Delivery guy waits at the gate ( sometimes 20 mins) for them to go inside and check fit of clothes. Then, if it's ok, he gets paid. If no good, they just hand it back, through the gate..LOL.
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Is food delivery a big thing in VN?