I assume that I can switch between block templates and there is no penalty to my rewards acquired so far?
I found the answer: "These are not separate pools! Whenever a miner using OCEAN finds a block, all of OCEAN's miners receive their share of the block earnings, even those mining a different template. This is a major step toward fully decentralized mining: OCEAN returns control to you, allowing you the option to mine the transactions you want without losing the benefits of pooled mining." https://ocean.xyz/docs/templateselection
Correct, fees are per share submitted