Sometimes I think that people who perform martingale do not bother to do the maths before starting. I'll try to do my best to explain how big your losses might be with the martingale strategy.
Even if your base bet is just 1 Satoshi your 50th bet would be over 11 Million BTC. If the base bet is 0.08 BTC then after 49 losses in a raw you'll need over 45 Trilllion BTC to make the next bet.
So be careful with that martingale thing, guys. )
Sometimes you can martingale for a small string of bets and hope to get lucky which I am guessing is what this particular user did. Of course he wouldn't have the balance to keep martingaling at that rate, but in this case he got lucky and hit it