How come there aren't like... five million copycat sites of this yet? All I can think of is BTCDice and it doesn't even seem to work?
Bankroll - how much does an upstart site need to hold off someones martingale? How about multiple whales playing at the same time?
SD (and competitors) need to be able to go out thousands of coin while waiting for the player to bust.
A "Martingale" is a failure betting fallacy, and a casino can only hope for players so stupid.
Mostly true, especially if it's a naive "double up" with each loss. I derived a martingale strategy that can be used to significantly increase the number of bets before bankruptcy
[strategy explained here]. The end result is the same as using a naive strategy, but the "entertainment" value is greater.