 Third psychological hack is called the cashless effect. This describes our tendency to be willing to pay more when there's no physical money involved. One research even showed that just by removing the dollar sign from the menus, it increases the sales by more than 8%. This is the reason why they always push you and give you perks to sign up for their app. To earn those golden stars, my friend, so then that way it is cashless effect. And on top of that, they take away the dollar sign. Once again, all these tactics used to get more money from you as a consumer.