if the block does not get accepted its not "losing 12.5" .. its just not winning /gaining 12.5..
If the block is orphaned after wasting hash power to find it, then should not we call it
losing?
nope.
if it doesnt get accepted and doesnt stay in the chain. then the pool never had it
there are 20 pools and only one block gets it in an average of 10 minutes
put it this way
EG thats why if a pool put in a reward of lets say 1000000btc..
it would get rejected.. does not mean it had it and lost it.. it just means it never had 1000000btc
yes it wasted hash trying..
but doesnt mean it lost 12.5btc or 1000000btc.. it just means it didnt win..
when you play the lottery.. you dont lose millions.. you just dont win, someone else does