The WPSSO and NGFB plugins for WordPress are licensed based on the WordPress Site Address. Typically, a Development, Staging, and Production website – for example – would require 3 licenses. In the spirit of helping our fellow developers, we are offering a free license for every license purchased – on all past and future purchases. So, for example, if you purchased a license for example.com (or www.example.com), you can also register dev.example.com using the same Authentication ID. This allows developers to purchase a license, develop a customer’s website, and then change the Site Address upon delivery, without having to purchase an additional license for the production website.
The developer special also applies to multisite licensing — if you have 2 licenses for example.com/one/ and example.com/two/, you could also register dev.example.com/one/ and dev.example.com/two/ using the same Authentication ID. The installation order is not important – you can register a Development site first, and the Production site afterwards.
In summary, for licensing purposes, example.com, www.example.com, and dev.example.com are all considered equal (they share the same license).