Perhaps they just ran out of blue ribbons! Ask if you didn't get one...and everybody else did...You might accidentallky been overlooked...
Actually that sort of thing has been happening for years....usually they have so many categories that they only have one or two entrants per category so they get the ribbons.
When I was a kid in about 1945 I entered a piece of string weaving, that I had made on my aunts loom.in our county fair. The judges had never seen that kind of "craft" before so they invented a category and gave me a blue ribbon!
And those ladies that won ribbons for their jelly or a pie or quilting hung those ribbons on the tops of their dresser mirrors and enjoyed the whole thing immensly!
It is a kind of nice American country custom!