Yes, selecting suitable "seeds" in the No-man's Land to expand the scale of Black Merchants has always been an old tradition.
Because in this world where divine power surpasses everything, even those keen on becoming Black Merchants hold some degree of reverence and fear towards the gods, making them cautious and restrained in many dealings and trades. But the residents of the No-man's Land are different; they have never known of the gods in this world, and naturally, they have no fear, allowing them to be more unscrupulous, just like Lair.
Of course, not all residents of the No-man's Land are like Lair; otherwise, they wouldn't have been trapped in the No-man's Land for so many years, never considering exploring the outside world.
At that time, Lair still didn't understand the reason, but later he guessed roughly the cause.
That is, some people don't want them to leave the No-man's Land, don't want them to see the outside world, only hoping they would forever watch over there.