I'm of the opinion that, while the judges run through the many, many entries in these type of contests (some of them being great, some of them being hot garbage), they should be allowed an avenue in having their own brand of fun in judging said entries.
I can kind of get the idea idol went with here, and many others that preceeded her. This is a fun little breather for the grind they have to go through to get the scores tallied up, as well as a cryptic hint as to how said levels scored if you manage to read in between the lines right. I get the idea behind it.
The problem is, I'm so hilariously bad at figuring out the subliminal message that I'm better off making some outlandish guesses.
TL;DR: It's a long, tedious grind. Let the judges have some fun.
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STELLA!