It will be rare when folks will pay you what you are worth to do a workshop, presentation, share original research, or hire you in general.
You get to decide how much you are willing to accept. You get to decide to say "yes" or say "no" or say "please find more funds and get back to me." You are worthy of what you produce and share. You decide who you will do a workshop/presentation/lecture/etc. for a lower fee based on your values. This will be different for everyone in the field.
Some of the most funds will come from academic spaces as they are run like businesses. If you wish to reach people of Color your fee may have to decrease as many organizations reaching out to us have limited funds (see white supremacy for reasons around this).
When you do accept a position, do your best work each time, regardless of the amount. It is your reputation, life's work, and often the spaces paying the least amount of money need you the most. If you have time to, always write a personal thank you card to the hosts of the event.
You are worthy. The work you do is important and needed.
For inquiries or to hire bi visit her site or email firstname.lastname@example.org