Feedback is Food

Has something happened, or is it just me?
I seem to be getting no feedback at all.
Unashamedly I cry out for it, but I am getting a lot of silence.
I have also contributed to a couple of blogs but I am not sure how they work.
Do they just die after a few hours? Or are the authors notified?
The recent one "Sigh, amateur (sic?) writers and laws" sparked my interest.
A big subject worthy of wider discussion but how do I know if my contribution mattered?
Maryanne