I have seen one of my local pet shops have(very young) tincs, auratus, azies, and leucs in the same tank. When I questioned them on it, they said they do it that way b/c they are not sexually mature yet. The problem lies in that someone comes in off the street and sees them all housed together and makes assumptions. In the end they potentially all get bought and thrown into a genetic mixer under improper care. I can easily see how people can create these hybrids through nothing more than lack of knowledge and ignorance. It is a shame...
I agree that the frogs shown in the culture cup look like tinc+auratus. They look too long and also, as JimO said, the leg patterning is just off to be auratus full.In my opinion, probably some non hybrids(from original buy), and then some offspring showing the hybridization. That would explain the variety in the morphology, as from my own experience, babies tend to carry certain group traits by clutch.
JBear