Recently there was a thing where VAC would erroneously flag AMD’s antilag+ feature as cheating, and issue a ban.
AMD then quickly disabled the feature by default but now Valve also patched detection for it and is now, at least according to these patch notes, reversing the bans.
CS GO (now CS 2) has constantly been on the top 5 most played steam games globally for a decade now, so yeah, I think people are still playing this game.