First, this is a dirty trick. And I don't like it. This site sends the users to the exchange with your referral.
Second, I don't like the UI of kucoin. It is closer to Yobit UI than Poloniex. Polo still looks more professional.
And third, the number of coins exchanged is very small. How can you compare an exchange with 10-20 coins with something established and tons of coins?
No. The comparison doesn't stand. This is just a referral trick.