Dice bot is a cool idea, but I think you could attract more gamblers if there were some random giveaways or partial compensations for those who lost a lot of money. A small faucet for trying out the bot would also be an improvement.
I hope you can really increase this numbers later. And about the house edge, you are saying you do not implemented it yet, so you tell us that is 50% chance to win this or what? Because there is no way a gambling system without any house edge, so please consider this
Why iusn't there? House edge is just something that is usually present in online casinos but it doesn't mean that it is necessary. Even at strict 50/50 chances people still lose quite a lot of money and I bet the casino could be successful like that.
I do not think they want to make amy improvement for the faucet, if they improve it by adding or lowering the time to claim, many abuser will come to grab it and never intended to make a deposit. And about the house edge, I think this is the only way for casino to have profit, without the house edge, I do not think that they can improve their game or their bankroll as well. This is pretty important for them to have it. May be for now they can still manage it, but they can't do this for long