Most people express any 'input' I usually think of, and if/when they don't rarely do I post. Not for lack of want, rather a lack of motivation in posting... I'm not one for 'forums', in any form.
As to feedback for authors (a subject I'm sure will be raised as a point): Being a writer myself, I don't ask for feedback, nor do I necessarily 'want' feedback. I write for myself, not others. I've not posted anything, yet; as the story I'm working on has, for the past year, been in the world-building stage. Also, absolutely nothing will be posted until its completion. That is the reason I don't, under normal circumstances, give feedback.
As to sticking around: As long as stories are written and posted to the 'net, I'll be around.