The staffs in South American casinos are really behind, and it shows up heavily in their poker rooms. There is an abundance of cheating, much of which is fueled by the casinos' poker room policies. For example, poker rooms in Ecuador, Peru, Uruguay and Chile replace the cards much less often than is seen in the US and Europe, and the quality of the cards some use is certainly inferior. This has led to a swath of card-marking teams, some amateurish, others professional, but they all manage to make money cheating without much fear of getting caught.
Argentina, the most important South American gambling capital, seems to be above the rest of the field on the continent, though I have had reports of a few American and Russian collusion teams working Argentine poker rooms.