Someone is gambling for a couple of hours now using martingale on 3% house edge... That's practically a death wish...
the important point of martingale is to have a high "F-up" limit, 3% edge provides a greater pool for him to gamble against.
you mean the max profit? it's merely 0.245 btc higher than the max profit of the 1% game... at an exponential increase of the betting amount (typical martingale) this won't even offer a single increase in most cases...