Fun fact: not a single person has ever been "margin called" on JD. Probably because the bankroll is so large compared to the size of bets that happen that there's never a significant percentage downturn in the bankroll.

Even if you're at 25x offsite, the bankroll needs to draw down 4% before anyone is margin called. The current bankroll is 19.6 million, so the site would need to lose 784,000 CLAMs to cause the riskiest investor to get margin called. That's 8 max-profit bets. (JD max profit is 0.5% of the bankroll).

It's not impossible, but it does seem pretty unlikely.