That statement is for the non-tech divers, they've always had that sentence in the notes for their dive packages, and they do provide computers at no charge for guests that don't have a dive computer. It is a nice perk for newer divers that may not have much equipment yet and for individuals that prefer to rent their gear. It's also nice if your gear is delayed - because luggage delays do occasionally happen when flying the small Twin Otter planes to the Cayman Sister Islands. We borrowed their free computers once just to try them out.
Sure, for an OC rec diver without their own or whose luggage is delayed it's great. I doubt they're going to loan out a constant PO2 CCR capable standalone dive computer to someone who is bringing their own rebreather.
Point being, the description of the packages makes me think they don't know what they're really talking about when they're offering these CCR packages.