floorless shelter techique

Hello folks,

I'm considering a Golite Shangri-la or similar shelter for winter snow camping.

I've never been winter camping, but I live in the Sierra, so it's time to start taking advantage.

So far I have wrapped my mind around snow stakes/ anchoring in theory, but how do floorless shelters work in snow?

How do the trekking polls not slowly sink, even slightly reducing the tension in the shelter.

I'm sure there's a simple answer, but I'm just trying to understand how using a pyramid shelter would work in the snow.

Thanks!