Unlike many modern apps, Audio Hijack is not a subscription. You pay once for the major version (e.g., version 4.x).
You lose access to the Rogue Amoeba support team, which is incredibly helpful for complex audio setups. How to Get a Legitimate License Audio Hijack License Key 45
If you also need apps like Loopback or Audio Hijack, buying them as a "bundle" significantly drops the price per app. Unlike many modern apps, Audio Hijack is not a subscription
If the $64 price tag is a barrier, there are a few legitimate ways to save: Unlike many modern apps
A single-user license allows you to install and use the software on all the Macs you personally own and use.
Key generators (keygens) are a common delivery method for macOS-specific malware.