I think I see what happened just by the posts here. It was too good of a deal and effecting the bottom line too much. On paper it looked like a good way to fill the ships during a traditionally slow season. But in practice it was too costly in terms of added when compared to the revenue collected. The bean counters always win. I know I am one.
Crown Princess March 2017
Explorer of the Seas October 2013
Caribbean Princess July 2006, May 2010 & November 2012
Monarch of the Seas November 2008
Crown Princess November 2007
Celebrity Zenith November 2005
Enchantment of the Seas August 2004