If Ive got a clue it goes like this
Pool speed ~5PH one have to be mining ~48h to get 500% (when difficulty increase this takes longer)
Pool speed ~2,5 PH have to mine ~96h to get 500%
If one starts mining and a block is then found in 5% , miner gets 1% of the full payout. Then next block lets say 20%, miner gets 5% and so on... And the other way then when a miner quits mining, payouts decrease until all 500% is used. If I´m right when quitting whatever % miner has reached payouts continue until mined blocks sum is 500%
So if a miner has started with the current round which is now at 218% and it hits now a block(i hope) miner could expect 218/5=43% of full payment.
