Try to make a convincing invitation to drive registration. Don't give them a reason to feel like your invitation is a corporate "fill in the blank" form. Target a specific segment and make a personal connection, so you can retain them longer.
There are a number of ways which affiliates can adopt to earn profits with webinars:
Include Q&A sessions and other discussions as a perk for your membership sites. You can also organize paid Q&A sessions for your audiences with you or other experts associated with you.
Content is the reason people register and attend your webinar, so without great content, either won’t get people to show up or you won’t get them to come back. Carefully select your topic/title/speaker based on your target audience’s interests and needs, as it relates to what your firm does. Generally speaking, webinars are intended to be educational—not “salesy”—so be sure that you create content that your audience finds helpful and valuable.