Make every player pay a deposit which is confiscated when they get caught cheating. Make servers with different deposit levels, so that people who really care about cheating pay over $1000 for example.
Better than having keys which I cannot control on my computer. And I don't play games anyway.
Or allow people running their own gaming servers that they can moderate. Solves cheating problem and when gaming company stops supporting their online game or goes out of business.
Better than having keys which I cannot control on my computer. And I don't play games anyway.