The Panda Arcade Store? Yong De and He Rong, the two co owners for the Arcade store never saw it coming at all. They had been informed about Jin hosting his mini games through their store, but both had vastly underestimated the massive appeal and thus the giant fan base it would bring them.
This was even more accurate after Jin had tweaked the paying models for his mini games. The first significant change that all the mini games were free to enter. For those who had paid previously were given additional points for the amount they had spent on the game. (And it could have amounted to a crapload of points since there was no cap to the amount they paid.)
Jin also gave the people who paid those the entry fees such as the Supa Robot Warz and Spinning Tops a special achievement badge which could never be received in the future.