Like most other high-leverage strategies, the DOTM credit spreads work until they don't . Ansbacher has been doing similar for many years. And he damn near got wiped out a few times.
Seems like after a few good years for these strats, everybody and their brother is doing them and selling books. Hell, I think these were even called the "house in the Hamptons trade", because they were so reliable. But then...something bad happens and the pundits go away for awhile...
I think most realize there is absolutely nothing new here. There may be a very slight positive bias to selling options (as can be seen by some of the newer index products) based on skew, interest rates, GDP, or whatever. But that's as far as it goes. Mav, riskarb, etc have shouted for years that there is no inherent edge. There can't be (look up put-call parity if you don't believe).
If Howard is successful at this, it's called trading, not edge. If he can truly say with certainty that a very bad overnight, and next few days, event will "only" wipeout 20%, then maybe he can survive. Hopefully his students can survive as well. I was trading SPX spreads during 9/11 and it was no fun...
Good trading to all.