Hey Fraser,
Do you think by simply playing a WSOP event, if asked, they would be able to issue an ITIN?
Chicken and Egg
you dont need one unless you cash over 5k hence its effectively a waste of their time
If you're thinking of " how it will tie up your cash " remember once you've filled the paper work they will pay you 70% immediately and keep 30% till the ITIN number comes thru