@Mathew, 1) How much Risk/Reward Ratio you think is wise? 2) How much Drawdown you believe is wise? ... we are about to launch a Signal soon, yet we didnt decide about the Core Risk/Reward and DD Strategies ...
It really depends on the strategy you use, but generally speaking as reward increases so does risk. But you can minimise risk by using fundamental / technical analysis and SL methods, and increase your reward by the same principles.
It would be fair to say: if you provide a successful signal (consistent growth month after month), you are certain to gain subscribers. You do not have to be "wildly" successful.
I look forward to seeing your signal and perhaps even subscribing! (though I would like an EA even better!)