FaceIT is indeed running 128 tick servers, as seen in one of their demos : GlobalOffensive

I turned on 128 tick in CS2 (+64 tick MM proof and JUMPTHROW DIFFERENCE) : r/GlobalOffensive

Steam Community :: Guide :: Counter-Strike – Hidden Matchmaking and Hitscan Director Revealed

Subtick for movement doesn't even work in theory. Valve is still wrong and I can prove it. : r/GlobalOffensive

Why can't I rank up in CSGO? - Quora

Feedback & Bugs Megathread: Nvidia Stutter Fix (3/27/2020) : r/ GlobalOffensive

Valve forced 64 tick on community servers. Screenshot from FACEIT demo : r/ GlobalOffensive

Hitreg issue evidence: player model desync! : r/GlobalOffensive

mat_postprocess_enable 1 IN 2016 : r/GlobalOffensive

Major hitreg/prefires issues possibly to do with interpolation : r/ GlobalOffensive

Talk about a Peeker's Advantage : r/GlobalOffensive