Other people set up stalls to make money. I set up a stall to take lives.
My Strength Pills send burly men flying three meters from a single fart. My Invisibility Talismans make enemies run naked through the streets for three days. My Truth-Telling Gum makes the city lord confess in public that he secretly wears women's clothes. Every product I sell is defective, but each one hits some poor sucker right where it hurts.
The System handles deliveries, the narrator twists the knife, and I count my money while being chased for my life.
Later, the whole city jointly petitioned me to close up shop, the Heavenly Dao personally descended to beg me to stop inventing new products, and even the quack selling fake medicine next door knelt and called me Grandmaster.
I sighed and pulled out another new product. "Don't worry, here's one more. I guarantee it won't rip anyone off."
Narrator: (The last time he said that, he blew up half a sect.)