That ended over 10 years ago.
If you have your heart set on that cruise, you could still go. I actually priced it out thinking how nice it would be to have the pools and common areas quiet during events on a private charter like that but the price was too high for a 4 night. You have to purchase through them at the price they set which includes conference fees. Although I wonder if they might offer discounts to recoup their charter costs if they don't sell out and the sail date approaches, or at least allow you to book a room without the conference fees.