[voice]
[Richie understands how much it sucks to have days like this where all these people show up and yet no one you know does.]
You could call it regular, but who shows up never is. Some people who were here before come back. Some people who have never been here before, too. Then they leave and a day or so later some of them come back. The only pattern so far is the amount of time between the influx days.
So times before it was a malfunction, but that regular a malfunction starts to look deliberate.