I don't read every reply and I don't read every posting. For instance I often skip old and new sewing rooms or spaces. I'll look at those when I have the chance to redo mine. I skip the featherweight topics. Not an option for me at this time.
On the other hand I never skip the photos of board member work. I love to see what others have been doing. I use it as my "coffee break" at work and sometimes even my lunch break.
What really takes time is when I do reply to a message and for several days I keep getting the replies from others.
I'd never get my work done if all I did was read the postings.