How does the Free energy bundle work?

At Wendy’s Shop, you can get 60 free energy points daily. You need to select the Free energy offer, type in your account ID, and select to whom you would like to send the offer.

You can find the energy in the in-game mail.

Note
Letters with free energy are stored for three days. You can find the expiration date at the bottom of the letter. When a letter expires, the energy it contains is permanently deleted.  Make sure to claim rewards as soon as you receive them. Our Support team cannot restore expired letters and rewards.

Note
One player can get only one Free energy bundle per day. It does not matter how they receive the bundle: as a gift or by sending it to their own account. So you cannot get several bundles from different players.