Users often want to test the "Pro" features of a program beyond the standard 7-day or 14-day trial period.
Most sites that host "activation codes" are riddled with intrusive ads and "fake download" buttons. Clicking the wrong link can lead to: Encrypting your personal files for a fee.
If you are searching for you are likely looking for a way to bypass a subscription or activate a specific software suite without a standard commercial license. Files with these naming conventions are common in the "warez" and software modification communities.