Has the straight actually been closed at all? All the real indie media (American Vagabond, James Corbett, etc.) all seem to question if the strait was ever closed, or if any of these Iranian mines were even real. You could use the ship trackers and see tons of ships moving in and out the whole time it was "closed."

I've heard some ships won't move because their insurance carriers won't cover them if their companies don't pay the Iranian fees, but that's far different than an impassible blockade.