I’m considering setting up a short term development site (multisite environment) where I can set up and try out new features, plugins, etc. We currently have four or five X theme licenses, and in light of that, I was wondering what the rules are for setting up such a site. Can I set up an X child theme on the site without getting into licensing troubles? Please advise.
Yes, you can always revoke the license of your live site and set it in your development site for testing purposes then revoke and regenerate again to set it in your live site again. There will no licensing trouble setting up x child theme.