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I also thought you are just looking for an admin for your site. I looked around your site, it is not good, just pure honesty. I think you have to be more serious on the development of your gambling site before you look for your investors. I believe you will have a hard time looking for any investor if your site is like that. Can't even log in, create an account, play anything. Regardless, goodluck
I visited the gambling website and noticed on how incomplete the website is. Like what most have also pointed out, the part where you are asking for a "manager" for administration does not equate to your thread, as you are looking for an investor. When you mean by a manager, it somehow implies that he/she will manage or be under the administration of managing the affairs of some gamblers.
One last thing to point out, what you need is an investor and a web-designer. Though I acknowledge your effort in creating this self-made website, it still needs a lot of work in order to compete with the titans of gambling websites available in the internet. Good luck, OP.