There are some unforeseen consequences to cheaters, one of them is the might of the banhammer. Due to Valve’s anti-cheat policies, it seems almost 40000 accounts were banned. This happened on July 6, after the steam summer sale.
According to SteamDB, Valve banned 40,034 accounts on July 6, only a day after the steam summer sale. As evident by the image below, it is quite the spike in Valve’s policy. On average, however, there are only around 3000 to 4000 bans per day.
A possible reason behind these bans is that due to the steam summer sale, many games became cheaper, and that lessened the cost for cheaters to do their thing. Naturally, the Valve Anti-Cheat or VAC did its magic and the accounts were banned. Or perhaps there was a bug in the policy which targeted non-offending users, leading to the utmost surprise of no access to their newly bought games. There’s no certainty on what exactly happened and there’s doubt on any official statement coming from Valve.