Some more information about the exploit, courtesy of PanzerSofa: https://vk.com/wall-102237486_286104
QuoteHail sophists! Today, the Western community contributor Silentstalker, also known in narrow circles as the "Czech electrician" in the official English-language discord server of the game, published news regarding the investigation into the case of players who used a certain bug in the system to cheat an unlimited amount of battle pass event currency. To understand the scale of the problem, in the second screenshot you can evaluate how effective this method of grinding BP coins was and remained unpunished for a long time. And it would be nice if these coins were enough to buy everything from the BP store and the players would calm down on this, but no - a number of the most enterprising ones came up with collecting blueprints for award cars from the event and after, cars obtained in this way in the amount of tens, and who had hundreds of pieces to sell for the Lootdog trading platform for quite earthly currencies on average at the price of similar tanks of the same level in the game market. In fact, there are many more interesting details to tell, but in short, the story with the "oligarchs of the battle pass" turned out to be a real detective story.
What this basically means is that RU players could do the exploit, gain millions of coins, use said coins to purchase premium vehicles from the coin shop, and sell them on Lootdog for real currency.
Comments also suggest autoclicker software is involved.
Quote... some used the autoclicker, and this is third-party software, he could do the same combination for days, hence millions, 10 Ki millions...