The flaw in your idea is that it requires a large userbase to operate. Although it's a great idea, no one is buying tickets. I took a quick peek at your site and all the lotteries are empty. If someone sees that, there's no motivation for them to buy tickets for it since it might be the only ticket there until your site closes down, pretty much making it a waste.

TL;DR: You're going to need to reach deep into your pockets for advertising for this to work.

Good luck!