Change is rarely accepted well. Especially when something is taken away, like an automatic service charge. But I am on board with Tobias as to why he made the change, assuming the change is legal.

I have used the Celebrity Cruises self serve wine dispenser. I was trying to figure out how I got the tip money back for doing such a spectacular job of selecting the wine, pushing the appropriate size of wine "pour" button, superior wine glass placement under the auto dispenser nozzle and especially for keeping my wine glass refilled. Tipping on a self serve wine dispenser still just seems wrong!