Why???
There is very little return on investment by sponsoring these shows and it's costly to have a booth. Especially when you factor in the costs of travel and food for staff. It has very little influence on the buying public. The average customer shopping at bb.com, Vitamin Shoppe, etc. doesn't know or care who sponsored the Olympia and who had a booth.
I wouldn't expect Singerman or Braun to understand this, they are not very good at marketing.