Or maybe make it into a bit of a game... put the onus on the user to make the random choices in that you can send a PM to up to eight users at once, so we could all agree to write a mail merge Christmas message and send it to eight random users. Or for extra randomness, choose one person to send it to, who then does that random sending to eight people. Ooh... that's just made me think... it could be like a chain letter... paying it forward, exponentially, big time
See how far each one gets around the membership

