Which is the case for 99% of things that are sold whether physically or digitally. Because, in general, at least in the West, most people don't want their days to be endless successions of bargaining where only the best and most persistent negotiators get good deals.

I certainly don't want to negotiate every time I want to read an article. Heck, I don't want to decide to pay a fixed amount every time I want to read an article.