Why wouldn't they? It's their job to provide the service they are getting paid to do even for us CC members ordering drinks during the CC HH. How and what they get paid is not my concern and only between Celebrity and them. It works the same way with RC with the CAS HH drinks. I guarantee you would never see me leaving a tip. I do it very discreetly, so don't ever assume what others may or not do. We are CC members, but haven't used our CC HH perk since the restart as we prefer the AI.