Hmmm... Looks interesting enough. My questions are...

So what percentage you will take when the user wins? Any minimum betting amount? On what platform? Do you have any specifics or it depends on the users choice?

After a win, what if the user don't share the percentage you are asking? Or is there anything a must to prevent of user doing that?
And if a loss, what responsibility you will take regardless the amount bet?
Are you open for middleman?