There are two reasons to consider switching to Ocean Mining. One is that you can help fight the spam there. Another is that you make more money.

There are two reasons to consider switching to Ocean Mining. One is that you can help fight the spam there. Another is that you make more money.

Incentives > moral shaming
Doing business with a calibrated moral compass doesn’t harm the business, in fact in a free market it actually helps.
If this were true, then the most moral businesses would dominate the markets. But we don’t live in a free market so I guess you can’t really prove that.
Every exchange where both the buyer and the seller are happy with the outcome is an example of moral business practice. You are right that today we don’t have free markets, but fortunately not every business owner is a crook, so we have enough examples even today. Customers that are happy with the exchange will prefer to work with the business that provides more value for their money, unless coerced is some way.
So for knots it's strictly business it seems now.
You can do business and be honest at the same time.
CLpool is also interesting
I suspect you mean CKPool, right? If not, do you have a link?
Oh sorry, yes: https://solo.ckpool.org/
Sources:
Ocean fees: https://ocean.xyz (see also attached screenshot)
Binance fees: https://binance.com/en/square/post/502257
Braiins fees: https://academy.braiins.com/ru/braiins-pool/rewards-and-payouts/
F2pool fees: https://blog.mexc.com/f2pool-mining/
Antpool fees: https://antpoolsupport-hc.zendesk.com/hc/en-us/articles/5983010227993-Miners-Settings-Fees

You have Wilson's Pool at 0.38% FPPS
That's really cool! I wonder how they afford such low rates? https://wilsonmining.io/pages/pool
Note: I found out after posting this that one pool has even lower fees than Ocean. But I don't think it tries to fairly distribute tx fees, so it's "effective" feerate may be higher.
SBI Crypto offers lower fees than Ocean. Their starting feerate is 1.5% and if you contribute more hashrate it falls lower -- to as low as 0.13%. https://sbicrypto.com/