Will you come to that point that you are going to ask for KYC?
I might depends on location where MintDice placed their company, and license they have (if they have it). Most of online casinos don't ask for KYCs, but there are some exceptions, especially if someone withdraw huge money, KYCs are required, just in those cases.
For as far I know none dice site is asking for KYC's. When some site is gonna do that, probably the most users will just move on to another dice site without KYC's. Most of them just want to gamble anonymous.