This martingale effect is really for those that have enough cash to waste hoping to double it and not for dummies or beginners, based on your explanation of this effect, it is not so easy for anyone with just 50 usd to really bet if I have to start betting from 10 usd, before I get to the 8 consecutive times.

I think I would have lost the 50 dollars already with no hope of getting money to further add. I will say this effect is martingale method is for those that are very reach and can afford to loose if the worst come.