A player or maybe multiple players have learnt how to scan a worlds 'chunks' or whatever and have been going in, scanning it and taking all the rares and leaving.
Something serious needs to be done @Mikelaurence
theres too many patchers, duping is still a thing and now world scanning! Ive tried helping by sending all the patches I know of, just to be ignored.
Seems like you want the game to fail since currently its demotivated the majority of the playerbase that still plays, which is very very small.