Gambling
Have you checked what are the regulations regarding gambling in your country?
If your country has gambling regulations, it wouldn't be a good idea to host the gambling aspect of the game on servers under your company's responsibility.
There is an easy way around though: Ethereum smart contracts. If you have the gambling process run as a smart contract on Ethereum, it's not anymore under your responsibility but that of the network at large that is to say everyone and no one, but you can still get a cut from "the house"'s proceeds as a "shareholder" of the smart contract. For that to work best, I would recommend to implement Jewels as an Ethereum based tokens. You could also sell "The House" tokens if you want to share the costs, risks and rewards of running the gambling smart contracts.
The gambling/jewels projects will be contained separately from the server projects. This is both for legal reasons regarding gambling and also to keep the jewels project insulated if there were ever any issues with the private servers coming under fire. The company that created conquer online has not done anything to private servers in a decade but it's better to be safe than sorry.
You haven't answered the legal aspect of the question. Is gambling regulated in the country where you are operating? If it is and you need a gambling license, are you planning on applying for a gambling license (that usually costs a lot and takes months or sometimes years to approve). If it is regulated, and you are not planning to follow the regulation, you are going to be doing illegal gambling, which means that sooner or later if the business grows you'll get shutdown, and probably get a lot of legal trouble. In some countries, transgressors to gambling regulation can do a jail time. Luckily, you can just get rid of the problem entirely by using smart contracts. That's the reason prediction market site InTrade was busted for illegal gambling, but Augur can't be busted because it's not running in any specific jurisdiction.
Understanding how well you thought that one through is key to determining if your business is sustainable. If you get regulators on your back and are forced to shutdown due to breach of gambling regulation, this will jeopardize the project and our investment.
