Hello, I've been seeing in the Newspaper (Robbery report) players getting billions from single robberies (National Museum, Hospital, Mafia Boss). Are there hidden rewards from these robberies that are not listed anywhere?

I tried digging in the forum and found this thread that proposes special rewards from some robberies, was it implemented (without the new area, just the extra money)? Can I read about it somewhere and know the probabilities?

thx