Looks like a nice site but I don't get this "chance every 10 minutes" thing. No matter what Hash Rate you enter you always get this "chance every 10 minutes" notice. I know it's technically true but I can't call it a useful information because to me it sounds like "every minute you have a chance to die". I think much more useful is a statement like this "in the next 200 years you will die for sure".
But thanks anyway for trying to do something helpful and free for people. Good job!