The claim of the recent amount of bans comes from the CS:GO community on Reddit, where they estimated around 1,600 people have been banned. All through the Valve Anti- Cheating System. That is a lot of accounts wasted.
The new ablilites of VAC can detect more than 16 cheat/ hack selling websites. One they are detected they are banned and they lose it all, in game of course. The VAC is most likely the best anti- cheating system yet. Hats off to Valve. It’s great to see that less and less people cheating and making the game less fun for everyone else.
If you want to read the Reddit page of the bans and such link below.