~2 months ago, Blizzard has issued a statement regarding the growing bot problem. You can read the original here. The overall point was that they’re aware of the issue, and working on systemic solution, but until that happens they will keep ban waves on bots.
And just to be clear – we’re talking about player-made bot accounts, not the official Blizzard bots you might face at lower ranks or when no one else is queuing.
The current update is that over the course of August and September, they banned almost 67k more bots. They’re also trying to evolve their methods of recognizing/catching them.
You can read the official post below:
Back in August, we gave you an update on our increased actions against bots this year. As promised, we’ve kept up that fight, and we wanted to give you a quick update on how it’s going.
In August and September, we banned 66,945 more bot accounts. That number is just the accounts banned for bot activity, not including other actions like inappropriate names or in-game language violations. We continue to evolve our methods and act against these types of unauthorized bots, and will continue taking regular action against them.