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Off topic but why did tic toc start showing me diy air filter videos right after I read this article?

Is there some kind of tracking?

Yes. And it's on your home IP address. I see things based on what others in my household have done with Tok Tok

So how would the tracking work exactly? Does this website have trackers that other companies can access?

Is there any way to block that?

yes, this website loads the full adtech parade.