Leveling Up With My Rebate System

[DING! You have awakened the Solus Rebate System.] [Item Received: System Card.] [You have Unlocked a Skill!] [You have Received a Rebate Ticket.] --- After being sentenced to death for a crime he didn't commit. Nathan D. Ledger, a struggling man with a younger sister and a sick father awakens the rebate system. Every money he spends comes back multiplied. The catch? It only works on purchases he makes on himself. In a world of powered heroes, supervillains, and a justice system that already buried him once, Nathan has one weapon to level up. [“Rebate System is Active.”] Author's Note: Book features matured and explicit scenes and will do my best to tag where appropriate. — Description from novelcodex.org