I get around 40 journals in my inbox every day. Of those I'l read maybe 8 of them. The journal title is really the key factor if the content will be of interest to me. Then again if its from someone I haven't heard from in a great while or seldom writes it will usually interest me to read what they have written regardless.
Life events is what catches my eye the most. Stuff like: 'I just got my drivers license' or 'There is this new artist on FA you just gotta watch' ... stuff like that usually motivates me to read it, especially if its posted by a friend.
that might get someone to look
I also very rarely comment.