The monthly quota is a great idea because you can upload any file you want an the next month you get your quota reset. You don't have to complicate over time deleting stuff for keeping your plan cheap. There's an app that supports sort of markdown on top of Evernote: "Alternote" but its paid and they haven't updated it in a while.
I would switch to paid Bear if they had their own server for syncing things, I don't like the fact that my notes could be using space in my iCloud account. Do you know another app that would do markdown and have also this idea from Evernote that you can upload things using an monthly quota?