Yes, you can send and receive Pings using your registered ENTERTAINER email address. But Pings and Smiles work on an account level.

The Primary Member has access to 10 Pings per membership cycle that can be used to send offers to friends and family during the membership validity period. These pings are shared by the entire ENTERTAINER family. Any Ping or Smile used by a Secondary Member will therefore be deducted from the Primary Member’s account. You can also receive 10 Pings per Membership.

You can buy back as many Pings as you wish, using Smiles. 1000 smiles will get you 10 pings.