The PvP season resets every two months and around two weeks after the reset, the winners are rewarded.
As a result of the large server fusion, we have recalculated the prizes: from now on, more players earn prizes and the top spots will get more than before.

You can read just how many El Coins are awarde for each position here:

Don’t forget: the season rewards will be paid out once per account. If there are multiple characters in the same account, the reward is given to the character with the highest grade.