"Brand Ambassador John Heald announced the changes on his Facebook page, saying that the Bottomless Bubbles package would now be $5.95 per person, per day for kids and $8.50 per day for adults,
plus gratuity."
"Heald’s big fear? That the price increase would bring out the cheap in some folks. “I hope I won’t be reading any comments saying that the small charge of $4 for a sandwich means that ‘I won’t be tipping the crew who brings the food,'” he wrote.
“If you do order room service on our ships, please remember to tip the server. A dollar or two is fine because seeing a server carry a tray of food to cabin 2377 and have him place it on the dresser while politely ignoring the sight of someone like me in a Carnival bathrobe that doesn’t quite fit properly is bad enough. To have the door slammed in their face with no tip is far, far worse. Thanks, then, for looking after our room service waiters, it is much appreciated.”
https://cruiseradio.net/carnival-cruise-line-eliminates-free-room-service/Ed: Don't forget to dress properly for the server.