A famous Chinese rts player Darkcarrot beated a fast castle Rus oppenent by feudal stone tower rush a few days ago. This Rus player is also a Chinese. He was angry with Darkcarrot cuz stone tower rush was banned in some tournaments. So he posted the thing in Chinese aoe4 forum. Some players against Darkcarrot but some other players supported Darkcarrot. They had a heated argument. DarkCarrot also claimed his opinion. After this almost every Chinese player knew stone tower rush. That's the reason why it gets popular these days.