Around Platform event limits, the documentation currently states that the Event Delivery default limit is 50K/DAY but Event Publishing limit is 100K/HR. Note the limit is 48 times more for Publishing.
What does this actually mean? Does it mean that a huge number of Events can be published as long as nobody is subscribing to them?
Best Answer
As the documentation says, you don't need to worry about those particular limits. Those are for Standard-Volume Platform Events, and you can't create those anymore. All new platform events are high volume by default.
The difference between the publish and delivery is the actor of the action. For example: if a user updates a record's field to a certain value, you want the object's trigger to publish a new event that will be delivered to another implementation. The trigger publishes the event. The platform delivers the event to its subscribers.