Yes some of the tech giants are guilty of this. And some aren't. And also some non-giants are guilty of this. And some non-giants aren't.
This is a possible kick in the nuts for Facebook and Google. It's not so much for Apple or Netflix, for example.
I don't think it's fair to make the grouping "tech giants " here. It's the "ad-giants". It's the companies whose business model is personal information. It's a small subset of the tech giants. In fact, much smaller adtech companies probably have a lot more to lose from GDPR than fb and google have.
Facebook, unlike a lot of online services, would still be able to target ads just because they know what people like without using any information people haven't consented to. A random news website on the other hand has to start showing me (a man) ads for women's clothing because news sites can't be as sure about my gender (or taste in fashion) as facebook is. So as weith so many things, I think the GDPR is just serving to reinforce the position of facebook, not the other way around.
>From having their information processed/sold without their consent.
The targeting of tech giants is implicit here.