I think the idea was to let people know that they are being tracked and provide a way to opt out. This created a terrible UX and compliance providers simply created a UX that bypasses the intended experience where you usually have to opt it anyway, or close the website. Most people just click accept, making the whole banner irrelevant 

 I close the page ever time. I'm  not even in the eu, I should never be shown those. 

 Everyone in the world gets them on the internet now because the way GDPR is written is so vague that companies would rather spam all of us with these popups than risk being fined.