Wanted to launch into a smart rant about how unobtainable costumes are for those who really need them, but @Suicide_Bunny said it all with one sentence. The point of costumes is:
About Krampus getting a costume, I’ve said it long before Krampus was ever released. Costumes were the final blow for S1 heroes.
https://forum.smallgiantgames.com/t/final-blow-to-tc20-heroes/141603