This made us think if he really knows how to sell a casino script, there's already bad intention, you should have spoken about the features of the script you are selling, instead, you are trying to oversell a product by posting guaranteed to make money for the casino operator and lose 100% for gamblers, if you're a marketer your boss should fire you and if you are the owner of the product, change your profession you are not good at selling.
Either he is selling the script or just trying to scam the investors, such a bad way to sell a product.
If I'm the investors, I'll just hire someone who can work, create a good script and site for me, that could be more worth it and more secured for both parties. OP should clear his statement about 100% profit for the site, its look like a scam scheme for me where the gamblers have no chance to make money at all.
The only one who will buy this script is a corrupt developer who wants easy money like launching it and after a month will take down the casino, this script is not for a long term it will eventually be exposed by their players, sure the house will eventually win but not in the case that OP is describing how a casino works.
Casinos are inviting the gambling community to try their casino for a chance to win money, the word here is chance, gamblers are not just playing to enjoy they are also wishing to win.