The difference is in Reboot you shouldn't be able to trade anything at all. Outside trades happen as a consequence and an acceptable drawback to allowing a free trade system within the other servers. Keeping it difficult (but not impossible because nothing is) to trade items of "value" in Reboot due to the lack of trade is a good strategy and should remain the status quo. Also from a financial standpoint - Nexon makes a lot more money in Reboot if you can't trade your junk NX items.A 1 for 1 trade is very easily abused. There are many items in the Surprise boxes that are obviously not as desired as other ones. Unless you try to assign a "market value" to items in a 1 for 1 trade someone can trade something really rare like a Feline Blue Sleeves for a junk box item. As compensation, a trade can happen outside of the game that violates the ToS because you have something worth "value" that you have just traded. The trade can also be exchanged for carries or other services.
This is applicable to normal servers as well, and they have their full NX trade system. There's no way to stop outside trades or anything, so this is probably the best that's possible.