 This is what the term "gold OA" meant from the beginning. However, a growing number of people now use the term differently. They drop the important qualification "regardless of the journal's business model" and use the term "gold OA" as if it picked out one particular business model, namely, the use of author-side fees or article processing charges (APCs). Originally the term "gold OA" covered both fee-based OA journals and no-fee OA journals. I use the term that way in this book, and many of us still use it that way. But many people use the term today as if it covered just fee-based OA journals. Some do this because they don't acknowledge the existence, let alone the dominance, of no-fee OA journals. Some recognize the plurality of OA journal business models but believe "gold OA" is the name for the fee-based business model. If "gold" had always meant fee-based, journal-provided OA, there would be no harm; we could use other terms for no-fee, journal-provided OA, as some people do today with terms like "platinum" or "diamond" OA. But because "gold" originally meant something broader, the new usage causes harm by making a formerly clear term ambiguous. Many people are understandably confused when an article or policy refers to "gold OA" without defining what it means by the term. The new usage also causes harm by leading many people to believe that all or even most journal-provided is fee-based OA, which is a factual error, not just a diction error. The new usage (as I said 