I proposed an idea to speak at Midwest.io in Kansas City, 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 paid some of my travel expenses, and I was working while speaking at the event. It took me 1 day to prepare for my 40 minutes speaking slot, and I had a great time. I'm a male who has been speaking for 5 years. Also, one of the best run conferences I've been to. They do set up everything for the speakers. It was great and I plan on submitting a talk next year.