Usage rights let a brand use your content beyond your own page, like running it as a paid ad. That is worth real money, so charge extra. Price by where they run it and for how long. A common add is 30 to 50 percent on top of your content fee per platform per term. Always put the scope in writing.
What usage rights cover
Usage is separate from the content fee. You are licensing, not selling.
Organic vs paid use
Posting on their page differs from paid ads. Paid costs more.
Price by scope and term
Charge per platform and per time window, not one flat fee.
Put it in writing
Define platforms, length and territory so it cannot creep.