I don’t think there is “conflicting interest” in a company like JP Morgan starting to use Zcash tech in thier Blockchain. The code that Zcash made for Qurorm is open source, anyone can use it to make your own chain if you want: GitHub - Consensys/quorum: A permissioned implementation of Ethereum supporting data privacy
It shows that Zcash tech is secure enough to be trusted by major Banks, a good boost for Zcashs image.