I have not posted content consistently for a few years. I got burned out on blogging and started a company—these events aren't necessarily correlated. Although I have profiles on most social networks, I only actually use Google+. I'm Twitter user number 2065 and signed up for Facebook when it was limited to college students—I've been here a long time, and I burned out on using those services a long time ago.
I also bought into Google services early enough that I've got an actual profile short URL, which goes to my Google+ profile. Those things are hard to come by. It's http://profiles.google.com/asurroca.