Those low odds are sure odds that tend winning so big bettors are aware of these odds and since it is a sure odds they accumulate more games with similar small odds and by the time they place the bet with a big amount, they earn high returns and there are odds boosters on some sportsbook markers and once your accumulated odds go higher above 8.0 odds you receive about 30% boost. So the jerk is to accumulate multiple small sure odds and make bet with a big amount.
You got the real point, apart from that is is bet for big players or whales, I have taken advantage of such odds myself by accumulating bets. After making my nice picks, I will have to add the small odds, the more you add the more multiplier you get when you are already on a long roll. Those odds are not good for single bets, unless for big players, but I use them to offset odds and have chances of technically increasing rewards. But in some cases they fail too, even as 100% sure as they may seem.
