The value of the shares will drop by .50 on the ex date, other things equal.
There may be some incentive for existing holders to hold through the distribution (it might be treated as a return of capital, as opposed to a dividend, tax wise, which would NOT be a taxable event).
However I can't see any incentive here for new buyers. Buying a special cash dividend makes no sense at all. Why pay the extra .50 now just to have it handed back to you later? It would make more sense to maintain your liquidity, then buy after the ex date-especially if this is NOT treated as a return of capital, in which case you would pay .50 extra, get that back, but be taxed on the .50 you got back!
In any case I will watch and follow but certainly not buy before the ex date. Good luck to you if you do. I hope it works out well for you.