Bitcoin Mining cost is minimized for BTC miners by letting them delegate their BTC hash rate or power to Satoshi plus consensus protocol called Coredao which uses delegated PoS leveraging BTC miners to be able to receive some rewards in BTC and Core at the same time just for only staking their BTC hash power to the Core Blockchain network which doesn't require additional work or cost of PoW mining again and the Satoshi plus or Coredao network is also developed by Satoshi from BTC Blockchain, Satoshi plus combines BTC protocol or algorithm of PoW and Delegated PoS to produce Coredao network whereby the delegated hash rate of BTC to core will help to harden the core network and the core network interacting with BTC network will also help strengthens BTC Security and allow the both Networks to work and communicate together, thereby scaling and solving the drawbacks in BTC and other cryptocurrencies as the both networks PoW and Delegated PoS works in harmony with each other, please see reference below.

https://medium.com/@core_dao/the-road-to-100-btc-hash-power-on-core-a1acc2672d17