I proposed an idea to speak at DevWeek in London, so I travelled internationally to speak. The event gave me a free ticket, and I was paid 500 USD to speak. My travel and accommodation was fully covered by the event. My employer did not pay my travel expenses, and I used my PTO to speak. It took me 2 months to prepare for my 90 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.