if pool on current round does not find a block, miners shares are keep (up to 100 blocks),
but their value is reduced by 50% everytime we dont found a block. When we reach 100 rounds (Block 272700)
all pending payments will be cleared. when pool has positive balance, all share are summed up to block# where payment will be made,
and burst payment are made proportional to total share miners own up to this time
40% of the reward is immediatly paid out and distributed among (All rounds) share holders.
60% for winning block and any block after that.
deadline value from miner is converted into share value using this equation
share = 1000 / ( NetDiff * Deadline + 1 ) 0.75
where NetDiff (network difficulty) is calculated by Block0-BaseTarget / Block#N-BaseTarget