PlayOnline wrote:
Personal rewards earned from skirmishes throughout the duration will have an increased chance to be of higher quality.
- Applicable areas:
Campaign period: Thursday, July 24, 2014, at 11:00 p.m. (PDT) to Sunday, July 27 at the same hour.
The higher a treasure coffer's rank, the more likely the adventurer will earn higher-quality skirmish stones. Don't get caught flat footed—prepare yourself for the new content coming in August with the best rewards skirmishes have to offer!
http://www.playonline.com/pcd/topics/ff11us/detail/12885/detail.html