It's about unambiguously understanding exactly what my rights are and how I can use that code.
In the case of the janky new 37signals license: what exactly counts as "... where the primary value of the service is the functionality of the Software itself"?
Who gets to define the "primary value" of the thing I built?
So would you say that (in your opinion) a source available license could in theory call itself open source, if it used language you found to be unambiguous about your rights? Or is that not possible?