AFAIK the actual reason most of these things did not appear is because of many states passing their own net neutrality laws, such that it would be a regulatory nightmare to offer services in violation of net neutrality without coming under fire.
The California law is particularly strong and had a huge impact.
The other big factor is the threat of new FCC rules, state laws, or federal law. As long as net neutrality advocates can pose a credible threat of passing rules that, from the ISP's point of view, are more restrictive than the status quo, ISPs have to think twice before engaging in what John Oliver famously called "cable company f*ckery".
