* https://www.privateinternetaccess.com/blog/comcast-still-use...
* https://www.eff.org/deeplinks/2014/11/verizon-x-uidh
Edit: Spectrum has apparently used this technique as well[1]. That covers the vast majority of home Internet users in America.
[1]: https://gist.github.com/jzebedee/7c5000779cd131df2498a3e6d04...
MITM tampering might not just be from an ISP. It could be from public wifi, or from an exploited/infected router, or with some care perhaps from another person on the same network/wifi, or from an office, or from an entire country.
[1] https://www.troyhunt.com/heres-why-your-static-website-needs...
It's common for people to say https is only for shops or site with logins, but if you can modify an http only site that might normally only show plain text articles, you can make it show fake payments, fake logins and malware downloads to steal data.