Proprietary licenses don't align developer incentives with customers. Instead you should consider non commercial licenses that convert to open source after some

Proprietary licenses don't align developer incentives with customers. Instead you should consider non commercial licenses that convert to open source after some time, eg 5 years. Customers won't pay for development unless forced to and it creates a tragedy of the commons. No large commercial deployment will accept 5 year out of date broken insecure software. Non paying users won't care that they can't use it commercially