I proposed an idea to speak at an O'reilly conference 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 assisted with part of my travel and accommodation. My employer did not pay my travel expenses, and I took unpaid time off to speak. It took me 5 days to prepare for my 20 minutes speaking slot, and I had a mostly bad time. I'm a man who has been speaking for 3 years. This was a for profit event. Also, it took some persuasion to get them to cover accomodation and partial travel. Refused to pay speakers fee. Took a while to pay the invoice.