I remember entering KRT to get myself some battle gloves and I got nothing but illusions for like an hour straight despite not opening chests or coffers anywhere else for at least a few weeks. There were a few people running around but I highly doubt they were getting results for the hour I spent running all over trying to open chests.
I did however managed to open one when it was in a spawn point far far away from where I had originally attempted to open them. Do you think there's a "real" chest while the rest are fake fodder to fool people?