I also don't see the need for this. Firstly it is a headache to implement and IHG IT hasn't proven to be a top notch organization
. Further, by restricting it to Elites who have vouchers for redemption they may not have the take up they wanted.
The one thing I could see though would be to have Elites get an extra 24-48hrs head start to book Pointsbreaks when they come out.