Comment by giodamelio

Ya, I'm not sure even that would be enough though to be honest.

I am kinda imagining a structure for a theoretical dev tooling business that might be OSS Core, and Source Available additional features. I'm not sure if there is a generally accepted definition of Source Available, but I don't necessarily mean that the source is just out in public on the web. It could be sent to you when you purchase the product, and could maybe even be sold on an upgrade sort of model, where you pay again for the next "big version" of the software, like the good old days of desktop software.