People in the WI can get to see their own islands play all the time. Only 2 of the 6 first class entities in the West Indies are not countries in their own right. (Jamaica, Barbados, Guyana and T&T) the other two (The Leeward and Windward Islands) are amalgamations of other islands. Those islands do take part in inter-island games too.

From a viewpoint of the game, the last thing WI cricket needs is 20/20 cricket.

The players need to be playing longer cricket

There is a far easier way to "bring back fans" to WI cricket.

Just start playing good cricket.

The easiest crowd filler.

Money is tight and days have to be booked off to watch a whole day's cricket so people are going to be more and more discerning as to what they spend their money and time on.

They are not going to waste it on a team that can't bat for a full day at times and gets declared on all the time.

People have not fallen out of love with the game.

As for this money and new competition, I'll reserve judgement for now.