“Co-branding, also called brand partnership, is when two companies form an alliance to work together, creating marketing synergy.”
Who wants to be average? If you knew that the average webinar according to Clickmeeting.com had only 28 participants, wouldn’t you want to beat that average? (28 participants does not necessarily indicate only 28 people registered—this means that 28 people attended the webinar at the scheduled time. Many more probably registered, but those whose schedules don't allow live attendance will only watch the webinar recording.)
If getting 28 people to attend your webinar seems like a lot for the size of your company, or if you want to exceed that average number, you might want to consider some alternative methods to getting more registrants. One alternative to the common promotion techniques of social, email and advertising is to use some form of co-branding.