I was unable to confirm any of this.
@Jack Rackham: I loaded your savegame, sailed the whole way from Antigua to Jamaica, and did not get a single mutiny. The crew was 11. The savegame is in the "Woodes Rogers" storyline - is there supposed to be a mutiny triggered by a quest?
So then I set up a FreePlay game with cheatmode enabled, starting as an Adventurer, so no merchant licence, no LoM, not much "Leadership" skill, and therefore no mitigating factors against mutiny - or so I thought. After giving myself 2000000 gold by cheating, I sailed around for weeks and didn't even get a warning, let alone a mutiny. I even tried capturing a few ships in the hope of being branded a pirate, and that didn't happen either - a different issue which I'll raise in another thread. So I had silly money, was still supposedly paying by salary, refused to pay salary when asked, so the crew weren't getting a blind penny and still wouldn't mutiny.
After some digging, I finally found why I wasn't getting a mutiny. Function "AllowUnlimitedLoot()" is defined in "PROGRAM\NK.c" and returns true if you have no LoM and are not a pirate. You don't need a merchant licence.
So I bought a LoM and then got the warning. And in due time I got a mutiny. I'd chosen a Bermuda Sloop as my starting ship and resisted the temptation to switch to one of the pirated ships with a hold full of gold, so I still had the Bermuda sloop. The deck contained at least one mutineer, some loyal crew, and my officers. It's a small deck so I started off up some stairs at the stern, and the loyalists slaughtered the mutineers before I could even get down the stairs.
After that, I bought some bonus items to boost all my skills, in particular "Leadership" up to a level where I could take prize ships. A few promotions to the LoM got my reputation up to "Bloke", and I'd recruited an officer with reputation "Rascal". By happy coincidence I was later attacked by an enemy Bermuda sloop, which I captured and gave to the rascally officer. He eventually mutinied and I recaptured the ship. This concluded the same way as if I'd captured any other ship - after the boarding, the ransack screen appeared, and I assigned a captain to the ship.
Attached is a save folder containing a save at Charlestown, Nevis, before the rascally captain has mutinied. I've given almost all my "Leadership" bonus items to one of the officers so that my skill is down to 3. So if you load this, it shouldn't be long before either your own crew or the companion mutinies. (It goes into profile "Player10", so unless you also have a lot of FreePlay profiles, you should be able to copy the file into place without affecting your own game. This does mean you'll need to change profile to try it.)