Are you also curious about those "one-timers"?

You know, those people who come here for one question and leave?

Some of them even took the time to fill out their profile a bit, or change their avatar.

I don’t think I’d ever come to a community, or even a plain old q and a site, and just ask a question and disappear.

Have you done this? Why? Weren’t you curious about answers later on (we can see when the person’s last visit was – and I mean those who were here but that one day)?