Why do open parks charge tickets?

I watched the news today, and the topic of "charging copyright fees for free photos of newcomers in the park" caught my attention. I feel that businesses now are really looking for all business opportunities. Nowadays, the competition for wedding dresses is fierce, and some people in Wuxi have come up with a deceptive trick to buy out the copyright of wedding photos in a park so that others can't get in and take wedding photos. Recently, Wuxi Xiao Wu encountered such an embarrassing thing. He and his lover came to a park in Wuxi to take wedding photos, but they were stopped by the park staff. If he wants to go in, he must pay first. When Xiao Wu signed a contract with the studio, he chose the one where location shooting was free, and he liked the scenery of the park very much. I didn't expect to charge for taking pictures. Xiao Wu: The photographer told me that there is a charge for taking pictures. I think it's strange. Why didn't you charge before, but now you charge? It is said that it was packaged by a photo studio. Finally, Xiao Wu had to choose another park, paid the entrance fee and successfully took photos on location. The reporter saw a sign at the gate of this park, which said that starting from this year 1 month, every couple who took wedding photos will be charged 100 yuan. Wuxi Lihu Central Park staff: Because this is a commercial activity, it should be charged. Quota invoice, a service industry, is presented by the staff. He said that the fees are approved by the relevant departments, and tourists are free to take pictures in the park. The reporter learned in another park that 5 yuan tickets are charged to every visitor here, but not everyone who wants to take a wedding photo can get in. The staff said that the competition for wedding photography is fierce now. The wedding company began to package the right of photography in the park three years ago and paid a certain copyright fee to the park. Newcomers can only register in this company if they take a fancy to the scenery of the park. Xiao Wu: Resources are public and everyone can pay. Why can we only shoot in this company? I think it's unfair. Regarding the practice of these parks, some netizens pointed out that if the photo studio even has to monopolize the scenic spots, do you still need to find different photo studios for wedding photos in the future?