Honestly, the fee isn't too interesting.. It doesn't matter whether they have paid 5 or 100BTC, what matters the most is that the exchange is able to generate over 100k in daily volume and was once ranked 7 on coingecko and feixiaohao. you didn't read much about the exchange before you commented(I see you even got the volume wrong on the comment above, their volume is way higher than that), they launched in 2017 December if I recall very well and they are in the process of listing on coinmarketcap.. I just felt like you needed to know this information since you were unable to dig it yourself.