From Playonline.com:

Ladies and gentlemen!
The event that adventurer dreams are made of—the Mog Bonanza—is nigh!

Without a doubt, linkshells throughout Vana'diel are abuzz as adventuring comrades discuss the extravagant prizes they've set their sights upon, the numbers that they'll employ to usher in such fortune, and other timely topics of the day.

Proceed here to learn how your dreams might be made reality via the Mog Bonanza!

*Bonanza marbles will be available for purchase from Sunday, May 16th, at 1:00am.