It isn't a statistical anomaly. He has a huge bankroll and thinks that the range from min bet to max bet is too high and allows players to successfully martingale if they have a big enough bankroll.
What do you think about that? Martingale is a losing strategy, no matter what your limits, in my opinion.
1% for max bet is not a problem.
The only problem playing against large players is time. Some of them play till they are ruined,
and it takes time to get them ruined. In other words, imagine a player with a bankroll big enough
to take away 2000 win with 95% probability (chose your favorite strategy for him - a martingale,
just constant bets 50/50 - whatever, with a big bankroll anything works).
Then only 1 in 20 of such players will not make it, and "not making it" means he loses everything.
And so far we've seen only how many whale-plays? 5? well.