Well, in the movie The Island (2005) the clones are nothing more than unaware organ donors to extend the life of the original.
More or less. I see Aristeia! like Formula 1 Championship. Years ago, it was said that McDonnell Douglas engineers were asked by McClaren about aerodynamics and nowdays McClaren are asked by McDonnell. Well, I guess it's a joke but with a little truth inside. Great mega-companies like Ypsilon test their advances at Aristeia! before sell them to nations like PanOceania.
So do they remove and transfer the Cube physically or download the Cube and upload it again? Just organ bank sounds like super fast surgery. Interesting. I am really into that negative aspects of such a sport. Seems very interesting to me for character development and motivation. Why would the Legendary Bahadurs consider joining the sport again after having escaped that painful procedures...
Well, Oberon is a 'machine' and is programmed for that, Final Boss needs money, Shona Carano's getting revenge and Koorie Queen needs promotion to jump started her career again.