Like I said, my guess is they figure less people to pay, and not a big loss for the company - People will just have to go to another cart and wait in a longer line.
Again, mid July, parks are packed. What other reason could there be for them to have multiple drink carts closed?
Traffic is higher elsewhere where they deem the resources better utilized. Hard to keep cold in extreme heat. The list of possibilities goes on with this one. BGW will close them during high heat because the difficulty to keeping them cold. If another one is swamped and traffic is relatively light at another they will close it and send the TM there for a period to assist. A cart is never closed just to have it closed with the profit margin and certainly does not play into cost reduction. Or 1 2 3 people may have called in and the replacement has yet to arrive.