I’ve just come back from London and when I asked the taxi for a receipt, the receipt I got had some promotional stuff from an online poker site and a coupon code that would allow the poker site to track players coming from this promotion.
I thought the idea of sponsoring taxi cabs receipts was a pretty cool one, particularly as the only people who ask for receipts for taxi journeys are businessmen who, generally speaking, have a higher than average disposable income.