I know this is just for "Tour & Cruise Operators" but I hope it doesn't make its way to all tickets:

https://saleslink.aa.com/en-US/blog/...operators.htmlIssued: April 1, 2024

Dear Partner,

American has carefully reviewed agency performance, and starting on May 13, 2024, we’ll be implementing stronger restrictions on the following:

• Cancellations after the 24-hour booking window, before ticketing (“Materialization” or “Materialize”).
• Voluntary rebooking the same segments, not resulting from schedule changes (“Churning” or a “Churn”).

Fee Changes

• Materialization
  • A fee of $50 will be incurred for all cancelations beyond the 24-hour booking window for Passenger Name Records (“PNRs”) that do not Materialize.
• Churning
  • One free Churn is permitted per PNR. All subsequent Churns to the same PNR will incur a $50 fee, up to a maximum of four charged Churns per PNR ($200 maximum).

Sincerely,

Agency Relations

American Airlines Modern Retailing