What Martingale is really meant for is allowing you to bet on outcomes that are less than the minimum bet odds. Your example shows a 1.1x and you could reduce that to 1.01x. But if you wanted to reduce it to 1.001x then Martingale is the only way you can do it.
Plus on top of that martingale creates this fallacy amongst many newbie gamblers that "how is it possible to lose 20 times in a row! I will definitely win!" and they make strategies based around that "fact" and when they end up losing, they feel like you scammed them.
I have seen plenty of people in this 830+ pages when people did martingale, lost many many times in a row and then came here and blame you for having a "rigged" setup as well. Why? Because they believe they "can't" lose 10+ times in a row in martingale with 50% win chance or 2x win whatever, because in their idea that odd is now lower because they lost that many times, the chances of losing 15 times in a row is same as 1, on that 15th one it is still 50% and yet they do not see that. Which gives house a psychological advantage as well, it makes them lose a lot more frequently because of that, and makes you win a lot more because they do not realize this.
The many consecutive losses may look unrealistic at first impression, but it becomes quite often because gamblers need hundreds or thousands of bets to make some decent profit with a low base bet as many faucets/free bitcoin sites' users are used to play. The less money the person has, the more greedy he becomes to double this amount through low bets, but really frequently. Then it becomes a dangerous journey and high loss streaks will be hit often.