Royal Caribbean is one of the last holdouts on defaulting to automatic tipping. They don't do it except for bar sales. You can have the tips added to your account, but you have to go to the desk and ask for it. They will then provide vouchers to you, which are for the suggested amounts, and you put these in the envelopes for handing out on the final night.
But otherwise, it is handled the old-fashioned way with the passengers expected to hand out cash on the last night.