If I'm not mistaken I think this is how they rank it.. Someone correct me if I'm wrong but...
1st time Carnival cruisers get the blue card.
2-9 times you have the gold cards.
and 10th time on you have the silver which is platinum...
Commodor Enchanted Isle of Capri-06.97
Royal Caribbean Sovereign OTS-4.16.07
Carnival Fantasy 4.28.08
Carnival Fantasy 10.27.08
Norwegian Pearl 3.13.11
Carnival Elation 11.14.11
Carnival Ecstasy 5.21.12