According to our license terms, a customer can use the plugin on the live site(s) specified in his package. A personal package holder can activate the plugin only on one live site. So, he can’t reuse the plugin on another site. If a user desperately needs the plugin for his new site, he must upgrade his license or buy a new package.
Before using the plugin on the live site(s), a customer can use the plugin on some under construction fields like →
- localhost
 - 10.0.0.0/8
 - 172.16.0.0/12
 - 192.168.0.0/16
 - *.dev
 - *.ddev.site
 - *.test
 - .*local
 - dev.*
 - staging.*
 - staging-*.
 - *.stage.site
 - *.wpstage.net
 - 
*.staging.site
 - *.wpengine.com
 - *.preview-domain.com
 - *.wpenginepowered.com
 - *.mystagingwebsite.com
 
Sub-domain or multisite: If you are using a sub-domain in the same WordPress installation as a WordPress multisite, then you can use the plugin both on the main site and that sub-domain site. If you are using a different installation of WordPress for a sub-domain, then you can’t use a single site license for that sub-domain. In this case, you have to buy a new single-site license for that sub-domain.