That is nothing to be surprised of since binance always getting the number 1 spot in trading exchange volume and also one of the most reliable and secured trading platform because of its promotions being offered to its users. There were also thousands of binance free and paid trading signals so that might also one the reason why there are many traders preferres using binance. For me, their trading tools is very user friendly and also collects favorable trading fee so that's a thumbs up for me.