Caution: The "Free Cruise" is a big scam!
Junk mail states: "Infinity Travel is an authorized agent of, Royal Caribbean International".
However, the junk mail is apparently from a company called "Infinity Incentive Group", not one of the variety of "Infinity Travel" agents I called.

This was published on a junk mail postcard for Royal Caribbean International Cruise.
When I called to be removed from the mailing list it was only a machine, it tried to sell me life alert.