Mitch Gross
Veteran
They are not looking at it like that. To the Japanese members of the cartel, it's a total pie, not the individual slices. Whether you make money on the GH-series or the FS-series, the only thing that matters is that you make money overall. (and Sony makes a crap load off their sensors).
But, insofar as the camera designs themselves go, Sony could have made a pro-style camera based on the A7S-series or the A-6300/6400/6500 series. And Panasonic could have done one of the GH-based series. And so on and so forth. The reason FS-7 soldiers on in its 5th year is because it's allowed a certain set of features but not others. At some point - and I believe these deals last 4-5 years - the deal expires and a new model comes out.
Meanwhile, Red and BMD poop out a design a year. That's 'cos they're not in the loop.
This is a tinfoil hat fantasy.