The target audience is gamblers who want something a bit more engaging than variations on dice.
It is far too complicated for gamblers IMO. If betting on chess had any real demand, then we should be able to find a moderately successful website doing as much. (And maybe you can, I have not looked)
This game will be crazy and may degenerate into something that isn't even fun to play. I would definitely suggest that someone sit down with 4 people and play it using paper or a spreadsheet. In fact, I might suggest someone hosts a game using available stuff on the net + google docs spreadsheet for bets.
One interesting thought is that none of the chess AI programs would work to cheat with, because of the opponents being able to move your pieces.
This basically takes regular chess and makes it far more complicated with all the cost analysis tied into having to defend your own pieces against being moved by your opponent. I am not sure that is a positive step for most people. Chess is already so skillful with no luck element, so it is sort of a dry thing to bet on. Th basically makes it far more skillful than it already is. Perhaps the DAC would need several variations to choose to play.
My 2 cents.