Huge transports come from Belarus
Or Ukraine,I remember as the train from Ukraine nears Warsaw Centralna,the train cab supervisor opens the wall compartments with a screw driver and all the women(mostly babcias) get there contraband of ciggs and booze and pay him.Those women I heard are called "Ants" I dont know the word in Polish.
I remember talking to one and she told me she makes 100pln a trip after fare and does that 4/5 times a week.