I remember a freezing midweek game at Watford, when the game was called off 30 mins or so before kick off due to a freezing pitch. They started to give out vouchers for people to get a ticket for the next game. The problem was they had young stewards handing them out to people outside the ground, who hadn't even paid yet.
Someone said they couldn't make the rearranged date and wanted a refund there and then. It became an "I'm Spartacus, no I'm Spartacus", as everyone else cottoned onto the idea. A queue developed, with people holding a handful of these vouchers, and walking away with wads of money, as everyone made a fortune.
Mind you wasn't there a floodlight failure at the rearranged fixture, and a local sparky had to be called out to fix it. I think the game did eventually go ahead.
A few details might be wrong, but the voucher money making scheme definitely did happen.