i thought the plans were a clever jab at commercial services, but i also found them a bit confusing. now i see where you are coming from and that does make some sense. though maybe instead put one box in the center and write: all plans are merged and free.
i would also make clear what changed, if anything. are you really letting users host private courses on your servers? the middle plan says self host at the bottom, which is probably not what the original plan was about.
i'd also like to see a way to use the code editor without login. no server features. only save in the browser and allow downloading.