That's because United gave Allison Preiss a voucher for $10,000 dollars -- ten times the normal amount.
This is how badly United didn’t want to give me cash: pic.twitter.com/sI7vmbeB2Q— Allison Preiss (@allisonmpreiss) March 22, 2018
United had oversold the flight and asked Preiss to deboard.
Turns out, she's a communications director.
When she began unleashing an angry tweetstorm, it soon came to the attention of United, and the airline quickly increased its voucher.