I have demonstrated exceptional proficiency in sending Firebase push notifications using PHP. With a user base of 200,000 and a live session underway, the need to send push notifications to all users simultaneously arises to inform them of the live session in PHP. However, Firebase push notifications can only be sent to 1000 users at a time. This results in the last user receiving the notification 10 minutes after the session has gone live.

In light of this issue, what steps can be taken to address this limitation and ensure all users receive the notification promptly?