nostr:npub16nf96938l0uqz4j6kw0m9w60h368yklusr9wmrrx9xy8v5yuhd6qu4q6as I was going to ask if it was Trump University but that closed down years ago and also you said prestigious, so it seems unlikely. 

Jokes aside, sounds like a shocker, hope you get paid. It's it the first time you have spoken for them? Does this happen regularly with other places you have spoken at? Pity, it must leave a sour taste.