On 0 servers with real players, out of 1 Steam servers that run it now, fakes and empty ones included. Checked 16:27 UTC.
kz_sanctum is a KZ (climb) map: you jump your way to the end as fast as you can. It is not one of the maps that come with the game, so servers send it to players from the Workshop when they join.
Over the last 30 days kz_sanctum was the #1063 map on CS2 community servers, with <1 real players on it at any moment on average - 0% of everyone playing. It ran on about <1 servers with real players at a time. Right now 0 people play it on 0 servers. It is busiest on Wednesday around 12:00 UTC and quietest on Monday around 03:00 UTC.
Right now 0, on 0 servers from the Steam server list. Over the last 30 days it had <1 real players on average at any moment. Fake servers and bots are not counted, and Valve matchmaking is not in the list.
On Wednesday around 12:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: CS2 KZ #93 [DE] — CYBERSHOKE.NET (TIER 1-3 - EASY) (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
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awp_lego_2_fb4,852 players on average
de_mirage_christmas2,858 players on average
<null>1,275 players on average
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duels_mirage_1x11,010 players on average
de_inferno889 players on average
de_nuke764 players on average