Can I spend that money any place?
Not exactly. They're not handing you 300 bones to blow on overpriced rum runners. The idea is to get you to explore and learn about the United States' chunk of the West Indies, so the credits are good for things like eco-tours, museums, food tours, and kayaking adventures.
But unlike those Valpaks you used to get in the mail that said "$400 in savings inside!", this arrangement isn't a fancy way of saying "coupon book." The credits will be good on anything you buy from these designated sites and activities, up to and including the full retail prices. Gratuity, of course, not included.
So how do I get these "credits"?
Simple. You book a trip to the USVI for at least three nights through VisitUSVI.com and the department of tourism will send you $300 in credits. These are actual paper you can use just like cash at any of the participating locations. And if you happen to travel in March (aka the month of the actual centennial) the DOT will throw in a commemorative souvenir.
All sorts of events are going on in the USVI to commemorate the centennial, which you can peep right here. But even if you're not into any of it, going on a vacation where $300 worth of your trip is covered is never a bad idea. Or, at least, never an expensive one.