I know I'm going to "out" myself as a complete and utter nerd, but I play PoGo (not as much as I did when it came out, because I have a life most months of the year). If Amtrak REALLY wanted to make bank during this event, they'd have a train run a loop going about 6 miles an hour. The game tracks your walking distance progress and the distance walked translates into progress in the game. The fastest you can "walk" and have the game count it is around 6.5mph. If they ran a train at 6mph, sold tickets and then just sold tons of food and beverages onboard (and even better, wifi and air conditioning) PoGo players would camp out in there all day. I mean, you'd need a dedicated track, but it would be a great move if they could pull it off.
They did it in
Germany and had great success with it.