On the Internet, there were massive complaints about Sberbank, which does not list “Thank you” bonuses to its customers. The problems began in November and, according to customer reviews, continue to this day. The technical failure, as experts call it, coincided with the season of sales, the so-called Black Friday, which in Russia stretches over the whole of November. According to market participants, it was the high purchasing activity that could cause the failure of Sberbank’s bonus program, which proved to be problematic to administer with too much data flow. The bank promises to restore bonuses, but only based on customer requests. …