I booked a flight on Delta, but couldn't use the ticket, and wouldn't be in a position to use any vouchers in the next year or two. I asked for a refund, but Delta said No -- I should have read the rules before buying. Fair enough.
But then I noticed that they had done something that entitled me to a refund, at least according the the Department of Transportation. But Delta didn't want to follow the rules anymore because the rules no longer benefitted them.
Their hypocricy is obvious and pathetic.