Since Spirit airlines ceased operations today, BoA already pulled the credit card from their website. I have a feeling they are going to convert all current cardholders to the Customized Cash.
Amex is still offering Spirit as a choice to use your incidental Credit. They will likely offer anyone who chose this and didn't already spend the entire credit to re-select their airline. (Let's hope they start offering a Frontier credit)
BILT has paused transfers to Spirit, and they will likely be removing that from their website soon.
Spirit Airlines Closure Credit Card Impacts
byu/Parking-Ice-9206 inCreditCards
Posted by Parking-Ice-9206