A payout is confirmed by the block it is included in.
Until it is included in a block, it's not confirmed.
I will translate it.
Lets say we make 5 blocks in 3 hours.
the network confirms them in about 15 hours time.
Kano does a 5 block send in payment. he pays a fee. and he sets the kano.is pool to always prioritize any payments he sent. this cuts costs of the fees.
here is a payment sent to me and to everyone in the pool
https://blockchain.info/tx/84b418f69c42d2abe779a2a5febaf1ef31963d2f8f4937a7fc7dd6f3ba70159a
look how many bytes of info
Summary
Size 41225 (bytes) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>This is a shit load of bytes this would need a huge fee
Received Time 2016-04-26 01:33:55
Included In Blocks 408929 ( 2016-04-26 01:33:55 + 0 minutes )
Confirmations 124 Confirmations
Relayed by IP 5.9.65.46 (whois)
Visualize View Tree Chart
So rather then pay 0.02 in fees he pays 0.002 in fees and the next block we hit confirms the payment.
Every once in a while a big set of payments like 7 blocks is sent. So way more bytes maybe 7 x 41225 to get any pool to confirm it
the fee would need to be high maybe a .1 fee
So waiting for us to confirm all the payments saves us coin.