You just mentioned it! Sssh!
In all honesty I don't see how an expanded demo can cut it, they could probably have something like the BLC 99 demo then where in you chase a target - even if you expand you can't do much than just bat and bat and bat, so one will buy for extended experience anyways!
Well one could set the numbers of overs elapsed and the target to 0 and bat first. If they are afraid of the demo being expanded they should limit some of the gameplay features in the demo. Either way an expanded demo doesn't make much of a difference. Its just to kill the boredom before the release of the game.