Any method in gambling will work for some time only, and there is no guaranty that the same performance will repeat next time as well. So don't ever gamble on automated betting because you may lose a lot of money without even you realise it. Just gamble manually sometimes to have fun and find some other ways to earn money.
You should always gamble only for the reason of having fun. If you are gambling in hopes of making money as a profit or to double your rent money, you should run fast away. If you are a profesional gambler, this should be the only time you are going to use the automated method of placing bets. Just my opinion.