I am going to explain this. It's all very legal and beaurocratic at the same time.
WTS negotiates for the use of stadiums for the District Conventions.
When a circus or a Boxing Match or whatever negotiates, the Stadium says,
"We have food and drink service for all of the events here. People depend on
selling their coke / peanuts / hotdogs at whatever events we have here. We
have contracts that promise them that right."
WTS says, "Our people bring their own stuff."
Stadium says, "We still want to offer them ours, it's a contractual thing.
We will open the foodstands, but refrain from sending vendors through the
isles."
WTS says, "No, we don't want that. Our people wouldn't use the foodstands."
Truth-be-told, they would use the foodstands. WTS tells it's own people that
this would be a worldly influence. In reality, the foodstands would be a great
distraction from the talks. People might enjoy getting a snowcone and a hotdog.
They would also spend the money at the foodstand instead of the contribution box.
The stadium reluctantly agrees, but notices that the JW's bought sodas and candy
from the vending machine. It was empty everyday. Next year, the same negotiations
take place. The stadium disagrees with WTS that the JW's would not use the
foodstands, citing the machines as proof.
WTS can't let them get a foot in the door. "We had best just put a man at every
vending machine and tell the friends that it's not for our use. Otherwise, this will be
the last year we can convince the stadium to keep the foodstands closed."