ByteDance, the company behind the popular video app TikTok posted robust growth in sales, BBC reported. An internal memo released to staff showed that the firm's revenue rocketed by 111% to $34.3bn for 2020. TikTok has been probed in China, US and EU over allegations linked to privacy violations. Still ByteDance posted annual gross profit increase by 93% to $19bn. The memo also showed that ByteDance had around 1.9bn monthly active users across all of its platforms as of December last year.