Do the magicians sell there products discounted at the lectures. Also they dont teach any tricks or sleightd at the lectures right.
Most sell things after lectures but not everyone does that. Usually products are cheaper at lectures, sometimes the same, it varies from person to person. Tricks and sleights are usually taught in lectures, some lectures might be on theory of magic, or how to advertise your act, or various things that might not excually have to do with tricks. Generally the tricks that are taught are from a new book or new video thats basically trying to be sold, some lectures might change the way you think about magic forever, others might just seem like a dealer show. Lectures vary alot based on who's lecturing and what the lecture is about, but they're always fun and educational.