We're obviously not talking about the same thing. Are the speakers invited for free or they must pay as well ? I was talking about the guys who make the speeche

We're obviously not talking about the same thing. Are the speakers invited for free or they must pay as well ? I was talking about the guys who make the speeches, not the general audience. I think I just realized that the talkers are really invited and do not pay anything. It makes more sense indeed :)