My hypothetical ISP and TV would also be violating GDPR if they did such things. They might currently face fewer lawsuits than google but that doesn't mean that no one cares.
"Internet Service Providers on the European market cannot sell the browser history of their users, without their explicit and informed consent". So they add another paragraph in the sign up screen you have to click yes on to get your discounted service.
This is the failing of the EU model. Users will provide consent to access a service in most cases. To work around that no the EU is jumping through all sorts of highly subjective hoops around what is explicit consent (it's usually pretty darn explicit), coming up with ideas of legitimate interest (talk about subject to interpretation) etc