When a person starts making small profits by betting on small bets, greed arises in his mind and he thinks that since he is winning, he should bet a big amount and if he wins the bet, he will be able to win a lot of money at once. From this thinking, a person starts from small to big bets and in most cases it is seen that if he loses the money he has bet on, then he faces big problems. To be honest, gambling is a matter where it is very difficult to control himself. If a person can control himself while gambling, then he can actually earn a good amount of money even while gambling.
Yes, the algorithms of casinos or gambling sites are built like this. The most important thing for them is your time. And the more time you spend on those sites, the more addicted you will become.
That's why you will see that when you open a new account they increase your winning rate (personally I think), and when you start betting more amounts, they may reduce the winning rate. I am talking about casinos. And if it is sports betting, then that is a different matter.