I was just going to post basically the same thing.
For me I have three options right now (I still think this case comes back to human trafficking, but I'm not married to the theory):
1) A targeted abduction for that particular morning while they dock in Curacao. They had to get her OUT of that room and know she was coming out. Otherwise, they lose their chance. She would most likely be w/ her family, or her brother at a minimum for the rest of the day and evening. So they had to make a plan w/ her. If they made a plan ("let's meet up for coffee..."), I think it's possible she didn't want her brother and parents to know what she was doing. Brothers are protective, he might not want her wandering off at 6am with strangers, even on the ship. This means the cruise employees are complicit in human trafficking, and I have no problem believing that could be true.
2) She was targeted during the cruise and her coming out of the room alone offered the perfect opportunity.
3) Crime of opportunity. She came out of her room, saw someone or something she shouldn't and was taken to keep her quiet or just taken purely for human trafficking. No previous planning. Wrong place, wrong time. Sometimes we forget bad guys can exist anywhere, anytime.
Again we go around and around in circles, but it all comes back to the morning, Y and maybe the waiter, and ???. :banghead: