Post Ethereum Merge, what do GPU Miners do now?

After the seemingly successful Ethereum Merge to Proof of Stake, the question for GPU is now what. BBT Carter discusses numbers & chain factors now observed in a post eth mining world. Many farms now are unprofitable and will shut down due to the security emission being to low to cover expenses. What are the key factors that can change this and what do people due that have deployed hardware to the space.

I will cover details that make up the calculations and the key things I look at related to success and activity of a chain. Much of this relies heavily on use cases on chains and what the future can bring related to development on each chain.

Chains discussed and sources include:

Flux - https://explorer.runonflux.io/blocks
Ergo - https://explorer.ergoplatform.com/en/latest-blocks
Rvn -
ETC - https://blockscout.com/etc/mainnet/blocks