Originally Posted by
dajdavies
Assuming it's the BAPP then the card that earns the voucher comes with a fee, and the OP then had to spend £10,000 on that card so to say they didn't pay anything for the voucher may not be entirely accurate.
But how on earth would you determine the value of the voucher? You didn't just get the voucher for those £10,000; you also got something else, like food or whatever you bought using the card.
Is it possible to sell the voucher to someone else? Lots of Japanese companies, like JAL and ANA, offer shareholder perks where you get a voucher for something (like cheaper tickets), and then there are shops where you can buy and sell vouchers.