Once that's done, you'll receive your two free Farm Cash, which should automatically update into your in-game balance. One thing to note about this promotion is that the actual awards ceremony takes place tonight, so I wouldn't expect the promotion to be around for much longer than just today. Still, it only takes a little more than 60 seconds to complete, so why not log into FarmVille long enough to see if it's available to you?
Have you found the FUSE promotion underneath your game, or has it not rolled around to you? Let us know in the comments.