Game Designer: Free is the most expensive

Qin Feng traveled to a parallel world.
It turns out that all the games are paid games, stand-alone buyouts, and online game cards.
Qin Feng immediately became angry: "How can we treat our dear players like this? Don't they even have the right to choose whether to spend money for the game? I want to save the players!"
"Dungeon and Warriors", "League of Legends" and "Cross Fire" are all free games launched by Qin Feng.
The players were shocked: Is this person doing charity?
But then: festive fashions, commemorative skins, a fire unicorn worth 888, and various charging methods, players are willing to take out their money.
Qin Feng: "The ones that are free are the most expensive."...