What you are all saying reiterates my above posting....
If you use your card for soda or get free soda water or water at a bar or from a drink steward,,, he doesnt make that 15% gratutity he would make on a purchased individual soda.
My point: Anytime you use the soda cards, ie, at the lounge or at the pool or at the bar,, leave a tip. If you tip the person $.50 a glass they will stay flocked around you. If you dont tip and assume it is part of the $40 you paid for the card,,, it will be rough getting soda's unless you go up to a bar and wait. And they will make you wait if they know you dont tip.
I have been through this experience years ago and learned the hard way. Now, I carry dollar bills with me on cruises which I use for tips.
Even when getting soda water at the bar, give 50 cents.
Just like we have to work to make a living so do the bar and drink people and unfortunately when you have a soda card they basically work for free. Be generous to them and it will come back to you in spades,, they will make it up to you 10 fold.
Happy Cruising