FYI -- I just got this email. I've been 50K or whatever they're calling it now for the last couple of years. Not sure I can justify another 15k spend (was hard to do before).

Thank you for being one of our most valued FRONTIER Miles℠ Members. We're writing to let you know of a change we are making to your FRONTIER Airlines World Mastercard®. Starting on March 26, 2024 cardmembers will no longer earn 2x the Qualifying Miles (now called Elite Status Points) after spending $20,000 in Net Purchases.