Costco planned to sell $500 Southwest gift cards for $429.99 from May 2-6, 2024 due to Sam’s Club running a similar deal from May 3-5. Sam’s Club ended up unexpectedly dropping the price to $419.99, so Costco did the same thing from May 4.
That meant that customer who bought the gift cards from Costco from May 2-3 ended up paying $10 more per card than those who bought them from May 4-5. To make up for that, Costco has been proactively sending $10 Costco Shop gift cards for each card you bought. There was a limit of five Southwest gift cards, so if you maxed that out you should’ve received a $50 Costco Shop gift card.