I think the word sponsor or co-sponsor is a bit of a misnomer. The phrase "a couple of people with a booth" would be more accurate.
Not so:
Hillary activist headlines CPAC ‘Big Party’
Invite-only GOProud event features lesbian Sophie B. Hawkin
Read more: Hillary activist headlines CPAC ‘Big Party’ http://www.wnd.com/?pageId=261677#ixzz1Da4tlyfV