This was posted on a few Facebook sites presumably copied and pasted from AMEX.
"Effective mid-April 2025, American Express will temporarily suspend merchant transactions in St. Maarten (Dutch side) for American Express Cards issued by third-party network partners. During this period, only cards issued directly by American Express will continue to be accepted at merchant locations on the Dutch side of the island. This action is being taken directly by American Express and is outside the control of local financial institutions and merchants."