I don’t know if this is a bug or a design choice but ever since the last LON set cycled out of marketplace last month the next set is not showing up in the marketplace. Maybe a switch forgot to be flipped to pop the oathbound set (the oathbound pack only shows up now when redeeming your free monthly SC and it’s the only way to get LON loot now)
Well you can also buy LON loot in the baz. Look for "prize" as the search term. But I agree with you that they missed it, just like they have in the past. It should be back soon.(tm)