It is the most played game on Steam at basically every hour of the day, without fail and has been like that for a decade.
It is one of the most popular games on Twitch and has been for almost a decade.
It is one of the biggest eSports in the world and is the most globally diverse eSport.
It is currently at 185th place. You are probably thinking of Counter Strike 2 which is a different game full of microtransactions and gambling which is what the grandparent comment was saying Counter Strike didn't have. Gacha is the strategy in the gaming industry that makes the most money.