While the SCMD Workshop Downloader 2 offers many free features, some premium features require a license key, such as:

Unlike third-party "downloader" websites that often go offline or carry intrusive ads, SteamCMD connects directly to Steam's servers. This makes it the most stable "scmd workshop downloader" available. How to Use SteamCMD to Download Workshop Items

This tool is primarily used by gamers who own games on other platforms—such as Epic Games Store