So yeah, I think I should have "managed up" so this initiative wasn't tied to the specific CTO but was a common agreement. If the CTO wasn't doing that, I guess I should have called his attention to it or done it myself.
To be honest, middle managers not thinking it was important is just baffling but that's another long story.
As for keeping ear to the ground, I wouldn't even attempt that because I really suck at that (and it's distracting, I'd rather leave). But many people have success with that approach.