There's still some time to implement so if you haven't heard from them that may not mean they're not doing it.
I've been part of the project to implement the EU GDPR changes where I am and we're due to compliant ahead of the changes and will tell relevant to people in due course.
Tbh, its mainly for those utter garbage companies that opt you in automatically. Now you have to positively elect to opt in so most companies need to change their marketing question wording. A lot won't talk about it, only bigger national companies are likely to do communications.