Long Distance service to the Caribbean

I am wondering why you don’t have the Caribbean, Trinidad & Tobago in particular, included in the World plan for $17.99. I assume you have a good reason and hopefully you can share that with me. I do hope however, that you will consider including Trinidad & Tobago in the very near future. It is very inconvenient to have to load money and the rates are higher than a calling card. Also, it feels like discrimination for the user although you may have a good reason.