Isn't' this a martingale system with 0.5 multipliers on loss?  Anyway. the time frame of playing can be reasonable to exit on profit.   But be warry of the consecutive losses. Martingale is proven to be disastrous once it met consecutive losses.  Aside from that, it is also possible that player will be on the losing end after that hour of auto betting because of the 50% multiplier on losing maynot or cannot recover the series of losses in one go.  But it is worth to try nevertheless.