Exclusivity means you agree not to promote competing brands for a time. It limits your income, so it should be priced and limited.
Set the limits
- Time: a week, a month, three months. Longer costs you more.
- Category: "no other cafes in my city" is narrow; "no other food brands" is wide.
- Place: a city, a country or everywhere.
Price it
Think what you might lose in that time and category, and add a percentage in the calculator. If the brand will not pay for it, you can offer a shorter or narrower version.
A worked thought
Suppose a food creator usually posts for two cafes a month. A brand asks her to avoid all other cafes for three months. She loses about six possible jobs. Even if she only counts half of them as likely, that loss is real, so she adds a clear percentage to the quote or narrows the promise to her own city and one month. The method is the same for any creator: estimate what you give up and price it, or reduce the promise.
Say no if it does not fit
If exclusivity would stop you taking work you rely on, say no politely. Write the limit into the agreement. See saying no.