Got a question because I'm useless at business. I get a lot of emails from companies asking me to do webinars, interviews, be a podcast guest, etc. They never mention any payment (not just no payment amount, but no mention of it being paid at all). Then when I don't reply, they follow up later with "btw we can pay you" and it's always phrased like they simply forgot to mention that in the initial email. I understand me being responsible for negotiating my rate, but having to negotiate getting paid at all? Is this the norm or is this just unserious companies trying to see first if I'll work for free and I'm better to just not engage at all with them at all?