I do it randomly, sometimes betting on small odds and certainly not those below 1.30 because it's not worth it at all and sometimes on big odds and also sometimes on multi but with a smaller amount of money bet because I just want to test my luck.
Bettors certainly have their own preferences and sometimes can even do what is not usually done because they believe in something.
As you said, betting on small odds is sometimes not even worth it at all because bettors often to get bigger profits bet with big money and even the smallest odds will not provide certainty of winning so that the greater the loss obtained than if you win, I mean even a businessman only targets what percentage of profit so if it is only below 10% with a large amount of money it is not worth doing especially in gambling where the chances of winning will still be 50/50 even at odds of 1.01.