It’s been driving me nuts too, the closest I can find to an answer is something in between the way different mining pools work and semantics of the actual mining process.
So I found one article that summed up mining pools pretty well (and is a lot clearer a read then posting all of the threads I’ve been in hunting for some kind of answer) https://captainaltcoin.com/what-is-pool-mining/
A bunch of stuff you’ve already learned while you’ve been digging into setting up the new pool, I’m sure but the part where it classifies the different payout systems shows what got me thinking.
Could just be a capped pay per share system, calculated off of the averages the recording of all of the data they get off our miners statistics. Then the hashing going on regardless of the pool payout is just the miners attempting to complete a block, the block not being found and switching to processing the next one. So the “shares accepted” by your miner are just being accepted by the pool as you are activly hashing the same data someone else is hashing and might be part of a pool getting that block. Basically just wasted hashing, even if it isn’t a capped system they could be intentionally taking a hit based upon the statistics of how often the pool might think it might get a block, keeping payouts constant knowing blocks will be coming and with that- the fee.
I’m learning and relearning a lot of this still tho, if you find anything from someone who actually knows please let me know Trying to figure out if there is a way to use that hashing power if it is actually wasted, has been frying my brain. So much processing power
Sorry it’s so long, more of a look into my thought process on it then anything actually helpful. I’ve got to master the 20 words or less skill.