> No. The point is, you've annoyed someone who liked your software, used it for personal use (costing you nothing) and would've happily recommended it to colleagues.

This is worth keeping in mind. Personally, this change is putting me off Caddy to the point that I might stop using it for personal sites. The big feature for me - instant LetsEncrypt TLS certificates - can be done on other servers now fairly simply. So the end result might be that I no longer use Caddy, which means I'll no longer have it in mind for commercial projects I work on.