Can I use the plugin on development/staging environments?
Development using Freemius module
If the plugin includes Freemius module, then all of our licenses allow you to use them on staging or development domains without counting them in your site activations limit. However, your domain name must reflect one of the allowed TLDs or subdomains from the list below.
TLDs that are considered as dev or staging:
Subdomains that are considered as dev or staging:
stagingN.* (SiteGround; N is an unsigned int)
*.staging.wpengine.com (WP Engine)
Additionally, if your domain is localhost (with any port), it will also be treated as a localhost domain.