Entering the city
The Everlor organization was the main antagonist of one of the arcs in the novel- 'the hero of velveric fights the demon lord.'
This evil organization existed till the very end of the novel, showing its formidable. Aeiron wasn't able to destroy it with how secretive and deep-rooted they were.
Everlor's members worked very systematically, showing that hierarchy existed in this organization too. Which meant, the low-rank and high-rank members would also exist, and this would lead to them making some rules which gave new members a little reassurance.
Thus Zick concluded: " joining Everlor is better than becoming a merchant."
Joining this group wasn't set in stone though, if he didn't like the agreement and benefits it provided him, he could only give up on it and try something else.
And if the agreement they offered restrained his movements, Zick didn't have the slightest intention to join this group.