You can receive rewards when the total number of Herostones (Paid) used in a single day reaches a certain amount.
The number of Herostones (Paid) used in a day and the available rewards reset daily at 05:00 (JST).
If there are unclaimed rewards at the time of reset, they will be sent to Presents.
*Enlistments and shop purchases may take time to process depending on your connection status, so be careful when purchasing right before the reset.