Oh no. I was referring to the fact that Wattpad's most popular reads are fan fiction.
I wouldn't say Medium ignores fiction. From my understanding, it wasn't their goal to begin with. Medium's goal has always been self-help-esque articles.
Fiction, poetry, and humor was never their intended market. So it's understandable that an area that wasn't their target market is getting ignored. It's the same as people who post their recipes on Medium. Or buying a chocolate bar at an auto parts store. It won't sell well because the company doesn't exist to sell that; they sell other things.