found a story where the main character runs a vr mmo dungeon and his first floor is a demonic farm. can't remember the name though.

I believe you have the numbers mixed up.

I thought you had to be level 10 to enter the second dungeon?

I think the author was saying he was overcharging for iron weapons. like three gold for a sword and dagger was really expensive.

over ten seconds. ten percent per second.