For a time we ran a build service that produced binaries that were commercially licensed if used for business purposes (personal use still free). But that was only with the optional use of our build service. The source code has always been Apache licensed.

Ah! So I guess it was just my junior dev mind that couldn't comprehend the nuances and didn't realize I could just use the open-source version rather than downloading binaries.

Thank you for the info, rather curious about trying it out at this point then. I was about to whip out nginx for a server I wanted to setup over the weekend, guess I'll play around with Caddy then!