Well, the answer to that is somewhat complicated code I'm working on. Basically compare network state compared to bankroll size and then user % of bankroll. It's pretty darn Database / CPU intensive but working to get the system 110% before I go public with it.

No fee per a roll. The 1% house edge insures profits over time. Probably a weekly fee on investment earnings. If you don't make any money I don't think it's fair the site make any (investment side). Somewhere around 5%-10% of the earnings seems to be industry standard so will likely settle in there.

Thanks sir, Hoping to have it up and running as fast as I can while making it 100% bulletproof and secure.