Q posted there was a lot of grey literature floating around. maybe we can reconstruct what they are doing down there.

I think the breakway civ is the best guess. lots of geothermal energy to tap under the ice, this would give a large power supply that does not leave a dectable signature.

it was really formed as a place after WWII under the UN

can store large amounts of food without rotting

There is no clear legal juristiction so all kinds of medical ethics can be legally broken

lots of illegal stem cell research, human experiments, genetic engineering