Why didn't I receive any DEC for my ranked battle?

The most common reasons why a player would not receive DEC from their ranked battle are:

1. The player has not purchased a spellbook. 
2. The player has purchased a spellbook, but did not reach Bronze league yet.
3. The player has purchased a spellbook but is using starter cards (also known as ghost cards).

The update released on 24 May 2022 changed how reward shares from a battle are calculated for ranked rewards. The new rewards formula considers the number of starter cards a player is using.  The same formula is used for both Focus Points and DEC.

Above is an example of a team that would consist of 1 summoner and six monsters with varying amounts of starter cards as examples. An exact calculation can be found here: What bonuses are applied to rshares?

In this team there was only 1 non-starter card so the player received 0.176 DEC for their win.

In this team there were all starter cards so the players received no DEC for the win.

You can identify your Starter Cards with the S letter on top right

You'll also find this message when you select any Starter Cards to battle 

External Links:

• Information on the release notes to date: https://docs.splinterlands.com/platform/release-notes
• Information on how Rshares work: https://docs.splinterlands.com/rewards/reward-shares-r-shares
• Information on the new ranked battle rewards https://docs.splinterlands.com/rewards/ranked-battle-rewards
• Official blog announcement about changes to rewards: https://peakd.com/splinterlands/@splinterlands/splinterlands-ranked-rewards-update