When thinking of the commons, consider water. Until someone put it in a bottle (enclosed it) to sell it, it was freely available everywhere, mainly from now vanishing drinking fountains. When I was young, the very notion that someone would “monetize” water and that anyone would buy it would have elicited howls of laughter. And yet it happened. You can sell anything you can build a fence around or put in a container if you can convince a buyer it is somehow necessary and “better” that way. Fortunately, literature doesn’t fit in bottles. Yet.