A TikTok'er who calls herself "Money Lawyer Erika" reads the fine print on receipts and documents "so you don't have to." Then she posts tips on how to use that information to get bargains and refunds from airlines, stores, and online merchants.
This one making the rounds covers Costco's "30 day price guarantee," which means she gets a $400 refund on a TV that dropped in price AFTER she bought it.
(Here's the video. Here's a clip of her getting a massive refund from an airline that overbooked her flight. There are tons of other ones on her TikTok.)