Removing/Nerfing Onyx Apples-How would it effect the game?

I'm pretty sure Zakum helmets would end up cheaper, or not change at all.

For an 8 attacker run, that's 8 apples, 20mil. There's no way 20mil extra in hp/mp pots are used up on an apple-less run. If the run costs go down, why would prices rise?

They will increase. People use a lot more time killing zak, and people's too lazy to kill zak in that much time for that low amount of money. Kinda.