I don't know. Agreed. First i'd heard of it.
It was advertised prominently at that particular drinks stand at least. Perhaps they were just trying it out for the first time to see how it goes.
PS: Did anyone try/notice that the beer stand in WSU now offers you the ability to pre-book drinks for half time. Bit like Theatre bars for the interval.
If you pre-book then you just join a collect queue at half time and hand over a voucher.
Did anyone try it ? Did it work ? Did it reduce...