Hi, we have last 10 minute statistics to distribute reward. Block time is 2.5 minutes. If you mine 12 hours and we not find any blocks - you can't get reward. Just like usual solo mining.
If you (and all pool) was not lucky, and turn off miner you can't get reward if block will be found later, because for this particular found block (171993) you don't send any share. Some user in our pool found this block and reward was distributed between user, who mined 10 minutes before this block was found.