Nguyễn Tử Quảng was highly criticized when he commercialized BKAV and started do business. He was known as "merchant knight", implied that he make BKAV only for funds. In react, on an interview in 2009, he stated that his business enterprise is don't just for revenue, as he normally desires https://bouchesocial.com/story131360/little-known-facts-about-nguyen-tu-quang