It's not that it can be used against them. It can be sold by Eventbrite as a conference recording with no compensation back to the conference or speakers. Basi

It's not that it can be used against them. It can be sold by Eventbrite as a conference recording with no compensation back to the conference or speakers. Basically this is a clause that "Nobody who makes a living selling their words, music, etc. should ever agree to participate in any event organized using Eventbrite."