We have a badge or large pin for carnival that you can put on your jacket. A kind of festival badge. In different variations and price categories. You can come to the carnival without the badge, but it is not welcome. With the price of the badge, you also support the event and all those who contribute time, energy and money. So it's a kind of appreciation for the people involved in the event. It's like that in life from time to time: you don't have to, but it would be respectful or appreciative. With today's optimisation, such recognition, especially when it costs something, is no longer opportune or self-evident. So if you find yourself in a situation where you benefit in some way - think about how you can give back some kind of appreciation. It may or may not be material or financial.
I wish you an extraordinary day!