Which sadly let to NASA making such costumes part of their PR which takes away all the creativity of it.

Hell, I'm guessing this was organized in a similar way.

Scott Kelly wrote in Endurance about, at the end of the his year in space, having to take a while bunch of Fotos of him in the cupola with all sorts of different shirts on to essentially create PR pics for organisations he is associated with. IIRC he was in that mentioned gorilla clip on an earlier ISS mission of his.