When I said launch promotions I meant some kind of small giveaways to let people test the site out, you can add some wagering requirements to it, so it won't get abused. Signature campaigns are great way to get recognition of forum members who are otherwise unaware of the site. Here's an escrow list:
https://bitcointalk.org/index.php?topic=855778.0 choose the one you prefer.
Actually, I'm not sure how much they'll be able to afford giveaways and campaigns, to be honest.
0.1% house edge is really really low. This could attract big players, but their maximum profit is too low to attract any big players that would pay for the signature campaigns and giveaways.
I think they just have to hope that word of mouth can carry them forward.