I'm one of them. The number one reason I signed up for Patreon as my funding platform 9 years ago, was because it was literally the only way of funding my writing that did not entail my SELLING it: my withholding it only for those people who paid me for it.
People get confused here. I'm not talking about my intellectual property rights. I'm not worried somebody is going to steal my copyright in my writing. (I mean it's a legitimate concern but that's not what I'm talking about here.)
I'm talking about the very basic nature of what it means to sell a work of writing, as a book or a magazine or a stand-alone article in a PDF.