Captive animals that will never be returned to the wild don't need to "pure" whatever that means. QUOTE]
Captive animals get returned to the wild all the time, usually through escaping but sometimes un-wanted pets get released, especially when their "worth" goes down and you can't give them away or they are illegally kept and the owner does not want to euthanize them, ie; Red Eared Sliders living in the wilds of the East Coast. Of course the hybrid thing will take off like a rocket, as everyone searchers for morphs that know one else has, to chase the dollars...as it did in the US, then it will bust to a degree, old type "morphs" will be worthless, hard to get rid of... a few will be wandering around the wilds, mating with various natural morelia ect... it is already happening now as carpets from other areas have escaped into new areas, pure brown coastals turn up in bushland around Sydney from time to time...