Yes, you can use a Basic, Pro, or Ultimate license for subsite(s) of a multi-site network if you don’t need a network-wide activation of the plugin.
This is Adeel, the author of the popular LearnDash myCRED Integration addon and Adaptive Learning with LearnDash. Former BadgeOS contributor and Ninja at WooNinjas. I have been working as a web developer for the past 8 years now. I am passionate about applying the principles of progressive education to online learning and I believe e-learning should evolve according to the learning paradigm of the 21st century