Is it?
You know the service providers track everything you do (even when you leave their site) and sell everything they discover to advertisers, and probably to others too.
And then you also get presented with news that matches what they learn, and so folks start to believe their own prejudices more and more.
Tiktok does the same, except its Chinese-owned.
I think it's all part of what is making the world so crazy. It's insidious and almost ubiquitous.