Participating in network security using specialized hardware (ASICs).
Bitcoin operates on a public ledger. Every single Satoshi (the smallest unit of BTC) is accounted for. You cannot simply "add" money to a wallet without a corresponding transaction from another wallet.
Most "Money Adder" files are actually Trojans. Once you bypass your antivirus to install the "crack" or "serial key," the software installs a keylogger or ransomware. Instead of getting Bitcoin, you lose access to your personal files or your actual bank login details. 2. The "Fee" Scam