I thought of that too, actually. Maybe it has some hidden attribute that goes beyond just the training hall bags.
I think buying reskins is a legitimate thing to do. It shows that you have given money to the developers, and have received something back in appreciation. The prize boxes are a bit misguided with the random factors etcetera, but they still accomplish this fairly well. The thing that gets to me is when they hold teeny tiny new mechanics over our heads for a hundred bucks, like with the overpowered mixmaster. That's just bad form on their part, as they could easily strive for something greater like they did in the beginning.
It is Three Rings' job to make the wiki, not ours (even if we donate hundreds of unpaid hours of labor to it).
The wiki should be accurate.
From these two assertions, it follows that Three Rings should write the Celestial Saber wiki page promptly and in a way that clears up this ambiguity.