Hmmm... Is this a free or low-cost conference? I ask because attendees typically don't like paying good money for a conference and then being pitched on one's own services.

If it's low cost and it's made known in advance there will be special offers, etc, then I guess that's okay. I've never seen an affiliate share in that respect. But I have seen coaches speaking either for free or a low fee in exchange for the ability to pitch.