Still no word on cause of this incident?

I don't share the certainty of others that we have enough info to know that operator was plainly out of bounds here, as likely as it may seem. I was in BVI this winter for a stretch and ended up hanging out with some of the captains from Tradewinds who work down there. TW at that time was not allowing their captains to use mooring balls at all because they'd gotten so unreliable. Not a great situation when many charter captains are required and probably better off using them than anchoring. Whether the captain must keep watch over a boat whether at mooring, anchor, or even dock (!) also does not pass the sniff test.