I was invited to be on a panel at GDC in San Francisco. 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 some of my travel expenses, and I used my PTO to speak. It took me 3 days to prepare for my 60 minutes speaking slot, and I had a mostly good time. I'm a man who has been speaking for 3 years. This was a for profit event.