I was invited to speak at Polyconf 2014 in Poznan, 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 took unpaid time off to speak. It took me 14 days to prepare for my 45 minutes speaking slot, and I had a great time. I'm a man who has been speaking for 6 years. This was a for profit event.