I also support the idea of OpenSourcing the code (security, confidence, reliability,...)
Enpass is providing a valuable support, new features and bug correction that require regular updates.
As mentioned above by @Sam van der Kris, I'm pretty sure business model will continue, even in Opensource mode. People are ready to pay for a service (package, support,...), even if source code is available. Of course, not at any price ! But as long as this price is reasonable, OpenSource model will allow that.
Thanks again for this excellent product !