I proposed an idea to speak at MobileWebDevConf in San Francisco, so I travelled internationally to speak. The event gave me a free ticket, and I was not paid to speak. The event did not pay for my travel and accommodation. My employer paid all of my travel expenses, and I used my PTO to speak. It took me 3 days to prepare for my 50 minutes speaking slot, and I had a mostly good time. I'm a person who has been speaking for 1 year. This was a for profit event. Also, Not much value in the event, however the public speaking experience was nice. I think the cost was too high to do again.