Most likely they went to see the rest of the SHOT Show offerings from other companies regarding firearms and tactical gear.
They may not have had a booth, I don't know for sure though.
There should have been some distributor's showing Cold Steel products.
They used to not have a booth because of the sword ban that was in place for the past few years.
I read recently that this ban has been discontinued, so who knows what that has for them having a booth at future shows?