If they don't pay, the reputation of KuCoin exchange will be damaged for sure.
Competitor:
Step 1) Hire bots to damage the competition and skew results.
Step 2) Hire PR to reflect on above.
Step 3) Dispute arises between KuCoin and WinPlay due to 1).
Step 4) Blame everything on KuCoin.
Step 5) Win.
The point of this is: Without evidence, I will be strongly defending exchanges until proven otherwise. Too many people easily fall for these schemes.