Personally for me I use free bets that are given by casinos in trying my luck so I takes odds that are not always the favorite to win games knowing that I have nothing to lose so I take the unusual options with my free bet as it gives me the opportunity to explore more events on the casino
But that's like wasting the money when you bet on the unusual games, knowing that there's a low chance of winning. If you play with it on games with high chance of winning, then you will be at more advantage to make a profit out of the free money the casino or bookie gave you. After considering it, that's why I try to bet in my usual manner so that I can win.