Re: a quick moan (not that quick)
Just a comment - I heard someone from one of the big music festivals on the radio recently talking about the cashless strategy: previously they had no real idea what to charge on-site vendors for their pitches, and found out they were being ripped off big-time by said vendors. So the data grab may be as much directed at the food providers as the punters. (Not saying this is the case here, of course.)