Rebound, has a point here, which is so true, especially for many of us that may be busy, and do not have enough time to reply or read all the posts of the day.
I understand about feeling invisible, but no one is ignoring your posts. I also know that there are times when we are feeling down, we tend to think negatively too, it's depression's common trick it plays on our minds.
I wouldn't take the lack or little replies to my posts,personal, but continue to post and participate in things here, doing so, I found my feeling like you are feeling actually was my own feeling due to feeling down or uptight about 3D events going on in my life.
Take care and keep in touch,
DE