7 reasons why I don't speak for free at (large) conferences and events:
1. Can I ask you to work today for 20% of your normal fee?
2. I invest a lot of time and money in being a 'professional’ public speaker
3. Don’t compare a top-speaker with an extra coffee-break
4. My added value is worth thousands of euros / participant
5. You don't pay me just for one hour of speaking
6. Your audience isn't necessary an interesting audience for me.
7. The route from an enthusiast participant to a paid customer is complex and long.