The reasons for OSS you list include "Bus-Factor", "Longevity", and "Continuity". I'd summarize all of those as "even if they can't do business with [company] anymore, users can continue on" - our customers also say that's very important to them.
... But what if "can continue on" means "need some of those proprietary features"? And you're not there to sell to them anymore? Or you've been acquired by private equity, started charging 10^6x, and users want out? Users aren't allowed to clone the repo, remove your proprietary code, and reimplement it with their own solution, because:
> you may not remove or obscure any functionality in the software that is protected by the license key.
Is this a thing your customers are concerned about? What do you expect them to do in such a scenario?