"founder" of startupschwag here ( https://techcrunch.com/2007/09/03/return-of-the-schwag/ ) - passed the torch to a guy about 10 years ago - would be happy to talk about how to bring it back, at the time the addressable market seemed... small.
I still have a few kozmo tshirts from '99 around here somewhere =)
all credit goes to valley schwag for the original concept - they went on to better things (getsatisfaction.com) - but as a subscriber to that service, I inadvertently received a cc'd (instead of bcc'd) list of 500 of their subscribers, and when valley schwag shut down, I reached out to those past subs and TechCrunch to bring it back!
I still have a few kozmo tshirts from '99 around here somewhere =)