Discrimination

Let take the last 2 events as an example.

With the crystals and at the rate monsters drop, you're looking at getting mediocre items. With NX, you have a shot at getting good items.

With the chests, no NX = locked chest. NX = possibility of getting something good

With that said, you can MTS, but you need something people want on MTS. A general rule of thumb is money makes money. NX makes NX. MTS is a a form of conversion. You can convert items to NX through it, but it doesnt give you NX, like how NX cards does, and it doesnt increate the total influx of NX, which can only be bought/won (maple points). Therefore, saying NX is available to everyone isnt necessary true.

My 2c (AUD)

Gold boxes are selling fro 20 mil in Bello...
And Silver for 300k-1mil.
But if you can't kill anything to get them...
Then you are out of luck.
And no one cares.
MTS a permit.
Then sell those boxes cheap then buy glove att scrolls then MTS them then shuttup