I was invited to give a workshop at Software Architect in London, so I travelled internationally to speak. The event gave me a free ticket, and I was paid 1350 GBP to speak. My travel and accommodation was fully covered by the event. My employer did not pay my travel expenses, and I was working while speaking at the event. It took me 3 days to prepare for my 1 day speaking slot, and I had a great time. I'm a man who has been speaking for 10 years. This was a for profit event. Also, the organisers take great care of the speakers, and have very fair terms for breakout sessions as well and not just workshops.