I think that every strategy is good as long as you are making money. Some traders prefer to enter into risky trades and blow their accounts. Others prefer lower risk and staying longer on the market. It is true that profits are lower then, but still, there are profits
The author has published some results here that he claims are from his real brokerage account. I did not (and could not) verify it but you can ask him direct? https://www.wealthsignals.com/Forum/Posts/My-LifeTime-Fidelity-Investments-Cumulative-Returns-187
Roy Niederhoffer performed terribly in 2019. He's at the top in terms of losses. -20.8% so far according to this article. https://www.zerohedge.com/markets/cohen-griffin-balyasny-all-hammered-quant-quake-here-are-best-and-worst-performering-hedge
Also I guess you do not understand the concept of wealthsignals, the author is not giving away his recipe (code), he is giving away the signals that it generates. So by selling his signals hangers a steady flow of income and can possibly make the millions.