I interact with dozens of people daily. I tell jokes, I listen to their feelings, I applaud their conquests, I mourn their losses. On the internet. You think any of those people are going to miss me if I'm gone. Kinda sad, really.
As somebody who's had a dear internet friend die, let me tell you that yes, we'd miss you if you're gone! I was (and still am) part of a tight community of people on IRC and one day we realized a guy in our group hadn't said anything for almost a month. He'd always been the quiet type of person who sometimes would go for a few days or even a week without saying anything, but it was really weird for us. These are all…
If you're communicating with somebody on a regular basis in person, and they die? You mourn, you send flowers. Hell, you might even go to the funeral home, even if it was in another town.
If it's online? You can go weeks or months and be clueless. And then when you do find out, you feel like you were robbed of something. Something important.