Like most people have already said, it costs more to make the 5 dinos than what they're selling them for.
I think it would be wise to set labels aside for a moment and look at the real meat of the issue. Ignore the words "deluxe edition" and look what you have. JWE is marketed as a triple A game. The usual price of triple A games these days is $60, the same price the so called deluxe edition is set to, while the standard edition is set at an unusual $55 dollars. If you put labels aside, what you really have here is a game with reduced content at a reduced price (standard) and a game with all the launch content at the normal full price of a triple A game (deluxe edition). People spend more than a dollar for cosmetic skins that add no gameplay value. $5 for five different, fully animated dinosaurs with their own AI? One might even call you stingy for being reluctant to buy that, especially when the standard edition in reality is just a reduced price.
Also, Suchomimus. No way I'm letting that dino slip through my fingers at launch lol.