Even in the terrible year of 1937, 44.4 percent of the GULAG labor camp population on January 1 was freed during the course of the year.
These weren’t death camps, these were prisons. You can read elsewhere in the same article about how most of the people in them had been convicted of non-political crimes every country in the world prosecutes. Just like in many other countries, people would serve their sentence and be released.
The article also notes how the vast majority of mortality in the Soviet prison system was attributable to the hardships imposed by WWII (also from pg. 1041):
More than half of all GULAG deaths in the entire 1934-1953 period occurred in 1941-1943, mostly from malnutrition.
Comparing this to the Nazi system that was directly designed to exterminate people is no more than roundabout Nazi apologia.
From a researcher who actually examined Soviet archives after the fall of the USSR in the 90s (PDF link, see pg. 1041):
These weren’t death camps, these were prisons. You can read elsewhere in the same article about how most of the people in them had been convicted of non-political crimes every country in the world prosecutes. Just like in many other countries, people would serve their sentence and be released.
The article also notes how the vast majority of mortality in the Soviet prison system was attributable to the hardships imposed by WWII (also from pg. 1041):
Comparing this to the Nazi system that was directly designed to exterminate people is no more than roundabout Nazi apologia.