It's not the albino gene that determines the intensity of the color, all that the albino mutation determines is the presence or absence of melanin. It's a different gene or more likely different sets of genes that determine the intensity. If you look at a pile of normal ball pythons, you'll notice a whole range of colors from high golds to dull brownish grays. Through selective breeding to the highest golds or the dullest grays, eventually you'll have an albino animal that is either faded or brighter yellow. And yes, most of the high contrast albinos will lose their bright colors as they become adults. Not all of them do however, and through selective breeding I think we will see more and more adult albinos that hold on to their bright colors. Right now though I don't think it's a sure enough thing to justify the higher prices.