I have been getting reminders to enter The Nats from event directors. They want me to enter before May 1st to maximize the award count.  I discussed this with Yolanda at AMA and she said that her cutoff date for ordering plaques is more like mid-April.  She requires three entries to order three plaques.  I wasn't able to extract what happens if the number is under or over three.  You can check entries yourself with this  link:
https://www.modelaircraft.org/nats-search?field_event_session_type=214&year=2026

I was able to glean this chart from AMA's site.

As you can see, $10 is the normal event entry fee, exception for stunt & scale which charge $65 and $40 respectively.  Stunt is a one- event catagory, so it's $65 for all you can fly, which is one event.  But it's possible to fly all six scale events if you care to come up with $240.  Not surprisingly, scale is lagging behind in entries.  In addition to the high hurdle of the $40 fee, the Nats is in direct conflict with the FAI World Championship.  Fun Scale and 1/2A have already cleared the three-entry threshold.  The other four events need help.  Based on my education in business, I believe that the $40 entry fee is well into the prohibitive range and has resulted in diminished return.

With their $10 entry fees, combat and speed have covered the three entries in all events.