I proposed an idea to give a workshop at DrupalCon in Prague, so I travelled internationally to speak. The event asked me to buy a ticket at full price, and I was not paid to speak. The event did not pay for my travel and accommodation. My employer did not pay my travel expenses, and I used my PTO to speak. It took me 1 week to prepare for my 2 hours speaking slot, and I had a great time. I'm a man who has been speaking for 20 years. This was a not for profit event. Also, Five other people also volunteered their time to help run this workshop; some may have been reimbursed by their respective employer.