At the time of me typing this, my event is only 2/15 full. Please know that EVERYONE is invited to come to the event on April 2nd!!

I'm not trying to come off as rude but I want to give you some advice about scheduling events in the future; don't schedule them the last week of the season. This is when most to all the leagues do their championships so standalone events usually suffer attendance wise, which is the issue you have ran into with your event.