There are plenty of reasons even beyond privacy and MITM content changes. Supposedly HTTPS is better for SEO and also there are browser APIs[1] that only work in HTTPS context
[1]: https://developer.mozilla.org/en-US/docs/Web/Security/Secure...
[1]: https://developer.mozilla.org/en-US/docs/Web/Security/Secure...
I have several simple games hosted on Github Pages using the storage API which is on that list.