Apex Packs for ingame currency?

For the time being they're excluded for Legends only and there are certain skins you can buy using the in-game currency.

But keep in mind you're playing a free game with 0 limitations when it comes to the actual game play, if you like the game and would like to have certain cosmetics for your favorite Legends consider investing in the product.

So the developers actually gain a profit so they can invest in new updates, content, cosmetics, systems etc.