Since there's bonus offered and there's limit on the bonus, KYC will be asked on case basis when MetaWin will find someone suspicious. Imagine someone abusing with 100 0.002 deposit to win the prize. It's possible so KYC can also be asked.
If metawin takes action like that, it is very objective in order to be something that could be detrimental to both parties.
I can imagine what if someone misuses deposits or other terms, what will happen next.
I agreed to the KYC request in this case.