New free way to sell your show

I thought some of you out there might be interested in a website that's just launched. http://www.rushcrowds.com/ It's a site that offers discount tickets to shows in Australia via Twitter. You can sign up for free. How it works is best explained by them: "RushCrowds is the new, affordable way to market your show, event or gallery opening to new audiences and fill empty seats. Using Twitter, RushCrowds makes it simple and easy to get more people to your event, by scheduling a Tweet promoting your special offer up to 24 hours before the event time, to our dedicated RushCrowds City Twitter accounts... RushCrowds lets you shift seats up to 24 hours before the show and uses the unlimited potential of our Twitter follower group and their followers to get your message out... Already use Facebook and Twitter? Then you’re halfway there. But do your marketing messages go viral every time? They will with RushCrowds which requires our audience to sell your message to their friends if they want to go to your show at your special discount price." Disclaimer: I'm not an employee or anything, but I do know the owners. They happen to be the same guys who started Arts Hub. Anyway, I thought some people might find it useful.