It took a total of fifteen minutes before Tarkov was able to sense any signs of life in the tunnel. And when he eventually opened the door, what appeared in front of him was a small market in a cave of some sort.
A cave that was once built by some smugglers in an attempt to dig a new way to Decidue, but they failed eventually after learning how hard it can be.
So now that same cave is used for different reasons at different times.
Just like now, where it was booked by the merchants guild for the underground market.
"The market is safe, even exposing your face and identity won't affect you in any way, as long as you remain there."
As for what happened to those who left the market after exposing their identity, there was no need for Alfin to explain that to him.
The market might boast security and freedom from the chaos of the surface world. But it doesn't mean these same customers who were acting docile won't harm an individual after they left the place.
