Unless you have an amazing network, an extraordinary topic, or an existing super brand, it is tough t get butts in seats even for a webinar. Frank Kern (known for his web launches and many successes) recently conducted a webinar with nearly 1000 people but his initial webinar was free with some very useful content (even in the free program). He uses a multi-touch system, lead pages, email, text and phone callls to make sure you attend. He then pitches the paid content while you are there. Kern has done this effectively for years.

Do you offer CEUs or credits for the attendees? My clients have no where near the brand that Kern has and we use the same tools as Kern, but we add pay per click, Social Media, and PR to drive our audience. I hope this helps?