>>> "Through this mass data collection they’re able to build advertising profiles, and spam you with ads they think match your demographic. By tracking your online activity, Google is able to make extremely accurate predictions on your gender, age, marital status, personal interests and even income!"

Are you kidding me? The ads that reach me are so incredibly untarggetted, i wonder if they know anything at all. I get ads for absolutely ridiculous stuff i don't even find the least bit interesting. some of it is straight up disgusting and repelling me from those brands. the ads i find online are incredibly ineffective on me. now, i am a pretty big outlier in terms of my values and interests. But, If I were an advertising spending money on that platform I'd be pissed off at how untargetted these ads are.

I'm just guessing but perhaps GDPR and other regulations prevent google from using all that information in a meaningful way.