I think it's more because SpiderBite (NGTZombies) was been hit more than 10 times (zombies deal 50 points of damage so if you multiply it by 10 you get 500 points of damage), for ME it's like easter egg (of course you can choose if you delete it and keep jugg on price 2500 or keep it and give jugg higher price). It's my suggestion if you could add it to next version I would be happy