If a commercial conference (ticket prices 150€ and up is a simple indicator) asks you to speak, be aware that you should be entitled to:
1. Attending the conference.
2. Travel, food and hotel room.
3. A speaker’s fee.
Yes, it’s hard to ask for it when starting out, but getting used to knowing that you provide value to the conference pays off in the long run.
Signed, someone who almost gone broke speaking at conferences. 😅