If you get a flying monkey you'll have to also attempt to get in on this glowing-mammal business. ..because then you'll glow green. ...and have an army of flying monkeys. Of course, you'll have to give up bathing.
Do you know a good broom maker?
Addressing the subject, I agree with pretty much everything NightLad has said.
As far as whether or not they're actually going to do this - i dunno. I'm not sure how widely available GE resources are that they could be employed to dominate a small corner of the pet industry. The prices our snakes command certainly would be tempting, but those same prices could be gotten out of GE puppies that carry the complete genetic makeup of a champion animal - and more people like puppies than they do snakes. Maybe the masses are less likely to protest the manipulation of snakes as opposed to puppies?
Anyway, if this starts being done with any kind of regularity, we can pretty much say goodbye to our market. It would especially challenge those who do or would like to breed snakes for a living.
Bad for profit, good for poor snake lovers.