Yes, they are illegal clones (they copy the graphics and gameplay and use their own development platform to play them). The problem is that in China, international intellectual property gets copied all the time and sold at a profit and the Chinese Gov't could give a crap. All those cabinets you see are just mass produced wooden cabinet with POG style hardware. Then you just buy their "boards" and you have a gaming device that plays similar to the original game, but obviously has regular push buttons instead of the iDeck or oled buttons.