The best trick of them all - which I am sure you already know - is to gather all the goods that have not been sold together with a minimum of crew on the flagship and sink the rest together with the bulk of the crew. In that way there are only very few to share the profit. I have killed many of my own men that way - and made a fortune.
And after that treatment there are still plenty of men willing to join one's crew for the next mission. Amazing how stupid they are - or how little rumour travels.