Serial Box is a long-running, community-updated database for macOS that contains serial numbers for various software programs. Unlike "cracks" (which modify the software's code) or "keygen" (which generates new keys), Serial Box is simply a repository of keys that have worked for others in the past. The Risks of "Free Download" Sites
Some malicious installers include "infostealers" that scan your Keychain or browser for passwords, credit card numbers, and crypto wallet keys.
Sites like Humble Bundle or BundleHunt often offer legitimate licenses for dozens of apps at a fraction of their retail price.