I was curious about the “bounty” aspect.
The Enrollment Act of 1863 instituted conscription but allowed individuals to pay a bounty to someone else to fight in their place. Bounty jumpers commonly enlisted numerous times in the army, collecting many bounties in the process.
The article about the Enrollment Act of 1863 also provides a good explanation
Substitutions were available throughout the war. The problem with substitution was that it provided substitutes with powerful incentives to desert soon after enlisting. Career "jumpers" made a living by enlisting as substitutes, collecting their compensation, deserting before their units were dispatched to the front, and repeating the process.