@megustafa123 Because they had just sold their loot and had nothing to lose.
You shoulda sunk 'em when they still had the loot aboard. Loot, especially valuable loot can make people stressed, stressed people make mistakes. The absolutely best time to attack is when someone else is vulnerable because they have loads of fancy swag aboard.
Also the fact that you were nice about it and left the island may have made them think you were weak.
For the record nice does not = weak. But you seem like you've learned your lesson. The next time a ship sails up and announces that they have lots of nice stuff just say "Thanks" and sink them.
