Yes, Save the World had those llamas you could buy, Battle Royal never had any of those llamas you could buy, they never had anything related to loot boxes you could buy in Battle Royal, lootboxes of any kind were only in Save the World.

You didn't need to purchase anything to get what you want in Save the World, if you didn't like what was in the box currently, then you can simply wait for the reset and see what is in the next box, you never had to purchase anything to get it to reset, you just have to wait it out. So no gambling involved, since you either bought it because you liked what was in it, or you simply waiting for it to reset and see what is in the box after the reset.

When it comes to Battle Royal though, there is no agree to disagree ,there are only facts. And it is an absolute fact that the Battle Royal never ever had any kind of lootboxes in it that could be purchased. It was only Save the World that had loot boxes until Jan 2019, and it was changed to remove the gambling.