Marv,
... or simply knowing that you log into a certain Groups.io might
trigger certain Google ads.
They might know you logged in to Groups.io, but they wouldn't know which group(s) you visited while there.
Because I use Gmail Google "knows" not only which groups I get messages from, but the content of those messages. But that's because of the email, I've never logged in to Groups.io using Facebook or Google.
Shal
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