Russian girls usually come from rural areas, often thousands of miles and a 24-hour train ride away from their place of birth. They are often young and inexperienced and then quickly overwhelmed by the situation.
Some settle into the new situation but many are gone after a few days to months. So it doesn't take much to get an emotional breakdown and due to the guidelines of the studios this happens regularly in front of the camera, while a non-studio girl would just turn off her camera.
The rest learns techniques to deal with the situation, but raises an artificial facade for this purpose. Even if you've found a nice camgirl, the chances are great that she nevertheless will become dull with time or is no longer there after a few months.
From there, this is unfortunately a very unpleasant business and the user rarely finds what he hopes for through the possibility of interaction. Mostly he only gets to see human suffering and/or gets tricked into spending too much money.