This. As a business traveler, I don't know how I would justify this to my finance department and/or management. It would take too much effort to justify the change in travel plans for a shitty voucher that I'd probably never be able to redeem.
Now, I am a frequent traveller and mostly travel on business. Now again, the vouchers are useless to me.
I think the airlines should offer real cash instead of vouchers. More people would be ready to take those instead of vouchers.
I can offer $100k in thanksgiving fun bucks as well every time I screw up majorly. It will be in denominations of $50 and you can use them towards future consulting with me. My consulting starts at $100 per hour with minimum of one hour. You cannot use more that one voucher per transaction.