Ok, so now that the block finished with 225% and I stayed in the whole time at or above the normal TH, does that mean the payout should be 225% of the normal @100% lock, right?
The block luck determines how often you are rewarded, not how much you are rewarded per block.
In the case of the last 225% block, how many times your shares get rewarded depends on the future blocks after it.
Once for the 225% block and then how many more times after that depending on the future blocks.
It is first easiest to explain what would happen if every block was average 100%
The N in PPLNS we use is 500%Diff, i.e. when we find a block we reward ALL shares BACK 500% before the block, not just the shares in the block.
Thus when a block is found, each share rewarded, gets ~1/5 PPS
If every block was 100% and you mine for a full block A, and the pool found 4 blocks after it B,C,D,E, all 100%, then each share in block A would be rewarded ~1/5 PPS, 5 times in block A, B, C, D and E.
Thus it would average out that each share would be expected to get ~PPS (actually it's average about 99.5% PPS since the fee is 0.9% but the 99.1% includes transaction fees)
However, luck means that each block found is some random % between 1 share and infinity.
The expected average over time is 100%, but as you can see on the web site, they jump all over the place.
It is important to see that it is the shares that get rewarded, not your hash rate.
Each share is rewarded 0, 1, 2, 3, 4, 5, or more times purely dependent upon the pool block finding luck.
It doesn't matter if you stop mining, or start mining, or hop in and out.
Each share will be rewarded depending purely on the pool block finding luck after the share is submitted.
That luck is random future luck, so you can't guess it before you submit a share.
What this means in terms of "reward per block" vs "your hash rate", is that it currently takes the pool roughly 60hrs to generate 500%Diff shares, so your reward, from when you start mining, will climb up each block found until you've been mining for ~60hrs.
If you stop mining, your reward will decrease down for any blocks found in the ~60hrs after you stop mining.
However, over time, the payout should average out, but over a short term the expected payout over time will jump up and down dependent upon block finding luck.