I proposed an idea to speak at Midwest.io in Kansas City, so I travelled internationally 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 2 weeks to prepare for my 40 minutes speaking slot, and I had a great time. I've been speaking for 1 year. Also, Conference organizers also arranged a driver from/to airport and were really communicative, accurate and attentive before, during and after the event. The quality of talks and diversity of speakers were really good. Great conference!