What Are the Privacy Implications of PPPoE Internet?

I'm getting fibre installed and trying to understand the privacy implications of PPPoE which my ISP requires for the service. I don't know a whole lot about networking, but something set off an alarm bell when I realized I had to enter my user ID and password in my router in order to access the internet. I also was forced to install a Nokia app on my Phone to configure the router, and, oddly, my identity was already loaded into …

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