I was at the train station in downtown Chicago last week: Ogilvie Transportation for those who need to know. It's a nice train station. About 15 tracks, I think. Trains traveling to and fro the city's suburbs, bringing mostly working folks to the city in the morning. Evidence, perhaps, that the Metra ads to encourage people to take public transportation actually work.
There are ads everywhere. I've seen ads in the shuttle at the airport, so it stands to reason there would be ads in the train station. Designed for commuters and those who are trying to save time and/or money and maybe even help the environment by not driving.
Nothing against either company.