I proposed an idea to speak at MidwestJS in Minneapolis, so I travelled domestically to speak. The event gave me a free ticket, and I was not paid to speak. My travel and accommodation was fully covered by the event. My employer did not pay my travel expenses, and I was working while speaking at the event. It took me 7 days to prepare for my 45 minutes speaking slot, and I had a mostly bad time. I'm a person who has been speaking for 1 year. This was a not for profit event. Also, the organizers clearly cared about their event and were open to feedback.