Because they simply do not care, and won't put any resources in policing the chrome store. I mean, just look at all the Chrome extensions owned by companies tha

Because they simply do not care, and won't put any resources in policing the chrome store. I mean, just look at all the Chrome extensions owned by companies that track all the websites you visit and sell it to marketers in the past 10-15 years (Exhibit #1: SimilarWeb). Google doesn't care. It's that simple.