function becomeGameSponsor() public payable disableContract
    {
        uint256 gameSponsorPriceFee = SafeMath.div(SafeMath.mul(gameSponsorPrice, 150), 100);
        require(msg.value >= gameSponsorPriceFee);
        require(msg.sender != gameSponsor);
        
        uint256 repayPrice = SafeMath.div(SafeMath.mul(gameSponsorPrice, 110), 100);
        gameSponsor.send(repayPrice);
        
        
        addPrizePool(SafeMath.sub(msg.value, repayPrice));
        
        gameSponsor = msg.sender;
        gameSponsorPrice = gameSponsorPriceFee;
    }