I think the takeaway from ICQ, AIM, MSN Messenger, Friendster, MySpace, etc is that as soon as you start losing users, then it's over and there's no winning use

I think the takeaway from ICQ, AIM, MSN Messenger, Friendster, MySpace, etc is that as soon as you start losing users, then it's over and there's no winning users back. No matter how ubiquitous the service becomes in one's daily life.