This explanation seems most consistent with the limited information in the article.
We don't know whether he had several -$400K sessions before his big run. Gamblers and non-gamblers talk more about upswings than downswings.
There could be some other unmentioned factors that aided him a little, but the capped downside, a lucky run, and selective reporting are probably a sufficient explanation.
That's funny, I much prefer the story of mybiggest loss in an hour of blackjack than any of my winning stories, just seems more entertaining and less boastful perhaps.
We don't know whether he had several -$400K sessions before his big run. Gamblers and non-gamblers talk more about upswings than downswings.
There could be some other unmentioned factors that aided him a little, but the capped downside, a lucky run, and selective reporting are probably a sufficient explanation.