Well, they can leave Disney with money but they have to work for it. On the morning that I was going to fly back home the other week my wife wanted me to stop by the World of Disney store in Disney Springs and get her a Minnie Mouse T-shirt, similar to the Mickey Mouse version I bought on my last trip. I arrived at the store a little over 1/2 hour before it opened and there were at least 20 people already standing in line. By the time they opened the doors at 10:00am there were maybe 100 people in line. I thought that was strange but I didn't think much more about it.
Once inside the store, I found the closest shirt to what my wife wanted and texted her a pic. As I walked around the store and waited for a reply several workers mentioned various 50th Anniversary items on the shelves that were selling like hotcakes on eBay. $90 purple shirts going for $250, $50 Starbucks tumblers going for $150, etc. I started grabbing a few things and thought maybe I could pay for some of my trip when I got back home and sold them.
I was still waiting for a reply about the Minnie Mouse shirt and so I got on eBay to check what these things I had in my hands were actually selling for. Maybe they had sold for what the workers claimed the first few days of the 50th Anniversary but not anymore. Prices were $10-$15 plus shipping above what they were going to cost me. It wasn't worth my time and effort so I put them back. I can see some local residents going to that store each day, buying bags of 50th Anniversary stuff and making $10 or so profit per item and making some money if they sell a few dozen things back home each day but it wasn't for me.
However, there is the other story about when we were at Universal many years ago and I found a genuine Ben Franklin $100 bill laying on the ground as we walked through the park. That paid for 2 of our 3 park admissions that day.