I proposed an idea to speak at Enigma Usenix in Burlingame, so I travelled domestically to speak. The event asked me to buy a ticket at full price. 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 9 days to prepare for this event, and I had a great time. I'm a man who has been speaking for 12 years. This was a not for profit event. Also, Enigma is incredibly welcoming of all types - ethnicities, genders, and levels.