Found out that the ticket office at Ogilvie now closes at 11:00 at night instead of at 12:40 when the final UP west line train leaves. Not sure if the Ventrure app has anything to do with that?
Unlikely the Venture app, but it might be due to the Ventra app.
Seriously, with more and more people using the app and kiosks also available at Olgilvie, there's less and less reason to keep an agent making $15 to $30/hour to man a ticket window.
My guess is there were a couple retirements or resignations in December, and the railroad opted to cut back the hours of operation vs. hiring replacements.