Ask what a good summit conversion rate is, and you'll get answers that vary by an order of magnitude, delivered with total confidence, by people who are all describing something different.

You can host something that produces most of the same result at a fraction of that, and the version that fits your actual life is the one that gets a season two. Which is where the return lives anyway.

Promotion isn't something you secure in an agreement. It's what happens when someone is proud of what they made with you and it's easy to pass along.

Which puts the whole question back where a host can do something about it.

Hosting asks more of you than any other collaboration format, and it builds things the other formats can't. Both are true, and people mostly only hear the second one.