From the second paragraph on the GitHub link you pasted:
Soil is a commercial plugin available from https://roots.io/plugins/soil/. It’s hosted on a public GitHub repository to allow for contributions from the community. It’s also published on Packagist to allow easier installation with Composer.
Excuse-me, I don’t understand,
that means If I want buy it for use it in any kind of websites ?
or its allow for anyone can download it from https://github.com/roots/soil
to use it for personal or e commerce websites?
and there is no deference?