I don't think it's fair for the people to pay for the gambling site's creation and have them pay you again to play it, I mean this with the future of your site in mind. People wouldn't be very pleased especially when you take into account the fact that you'll be the ones to take the profits of your site yourselves. Might as well use a different take on this, perhaps look for a private investor, just don't crowdfund it.
If its shares that you are selling now, then you are in the wrong forum and your target market is not in this community since that share that you are selling is not for sale using Bitcoins for sure. Furthermore, you need to be transparent, where is the company located, who is behind the project and their back ground as well. I tried to open the link you posted but it is not working. Is it because domain name is in Russian?
It sounds like they are located somewhere in Russia, though even that is not certain since it's on the internet. I guess it's fine that they aresharing this project in this forum since they will be using cryptocurrencies as bet payments anyway, what I can't quite understand is why crowdfund a project that you would expect the people to pay you with?