A more sophisticated version runs silently in the background, monitoring your clipboard. Whenever you copy a Bitcoin address (e.g., to receive payment), it replaces it with the scammer’s address. You think you’re sending payment to a friend, but you’re sending it to the thief.
The “Bitcoin money adder” is just the latest name for a scam that has existed since Bitcoin’s early days. Past iterations include: bitcoin money adder v50 full 194 new