I like playing %33 and triple when lost. It does end your bankroll quickly in a hurry if it goes bad in a row but it also makes good return if it goes well.
Doesn't every strategy make a good return if it goes well?
Absolutely not! Classic martingale makes a ridiculous return of just a base bet. It doesn't matter how many times you double your bet (at 49-50%), even though you may win in the end (which is not given as, I hope, you understand), you just recover the amount lost in the previous steps and earn only the amount that you started with (that is the base bet)...