Maybe they want to finish the audit first? Or other then that there's no reason to not showing the code (they're not working with a super secret algorithm)
I agree with people wanting to see the code. But on the flip side I don't see why people want to see it so badly? There have been tons of ICOs which have collected a ton of money with no product/platform whatsoever. I'm not saying this is the proper way to do it, but not having the code ready right now isnt the worst thing.
What if they are collecting money to hire devs to finalize the code?