>I'd argue the definition of what is open source is up for debate
It's not up for debate. It hasn't been up for debate for years. There are two generally accepted definitions of FOSS (each addressing the F and OS respectively):
https://www.gnu.org/philosophy/free-sw.en.html
No one disagrees with these who isn't trying to sow discontent in the open source community. Disagreeing with the OSD or FSD is akin to denying climate change.