Ok I see, thanks or the answer. So basically instead of mine it alone they share the pow "puzzle" and after solving it first , the 12,5 btc are divided to everyone who participated considering that someone who calculated more hashes per second will receive more than someone who had a less hashrate, right?
AFAIK that statement of yours is correct every pool share their own profit the first pool to find the block will eventually mined the block and divided all the the block rewards along with their participants in the pool. Nevertheless you also need to study the ff:
If the number of unconfirmed transaction grows higher than expected mining pool would only accept a future transaction with a reasonable amount transaction fee. in other words oneself need to put a big amount of transaction fee every time s/he needs to send a transaction to make it confirmable.
The power of your mining equipment have the equivalent power consumption.
The rewards of every block have a halving event estimatedly every four years.
