> Wouldn't it be better to put the emphasis on a) core devs who do this 
> in their free time, b) core devs who would be available for hired work, 
> and c) showing off which companies indirectly support Python via 
> employing core devs and giving them time to do core dev work as part of 
> their job ?

I still think that a) and c) should be separate from b).  Core devs might be contributing in their free time (i.e. a) or as part as their job (i.e. c), and on top of this they might or might not be available for hired work (i.e. b).

> Essentially replacing "disclosure" and "financial interests" with 
> "motivation" and "support".

Agreed.  Perhaps even "affiliation" could be used, even though that doesn't imply that the affiliated company supports CPython.