I just happened to see this thread, and would like to join in as someone who has been betting at a very high level for over 15 years.
First of all, I have to say that any theories about the odds being "wrong" in an event like MLB are ridiculous. It is not a small market like the Bulgarian second basketball league, but a market that can absorb millions of dollars without any problems.
Therefore, it is a real mystery to me why the author of this thread made such a bet at any crypto casino, instead of for example at Pinnacle where a click is probably $50.000 and more.
What BC.game did is just an demonstration that anyone on the internet can open a casino, get a license for a few thousand dollars, invest in promos also few thousands, and in this way literally rip off anyone for any amount. There is absolutely no valid explanation for voiding someone's winning MLB, NBA, NFL, or any other big-market bet.
If I can help the author in any way, I would be very happy to do so, and the advice for the future is to play such bets at places like Pinnacle, Asian agents like Sportmarket, etc.