While the video game juggernaut didn't reveal actual numbers, we do know that Grand Theft Auto V has shipped over 100 million copies worldwide, and GTA Online was pulling in around 8 million players a week back in November, 2015. So… it's more than that, obviously.
It seems that the Diamond Casino Update, which was added to GTA Online on July 23, was a big draw. The recently added casino allows players to gamble their cash on a load of casino favourites like blackjack, poker and roulette. However, because of gambling laws in countries such as North Korea and China, some players aren't able to access the casino. The 'are loot boxes gambling?' debate rages on, even if the UK Gambling Commission says they aren't.