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Circle
You ask, they say yes, and you are both in it. There are no followers here, no feed, and no list of everybody using the app for you to be found in — somebody has to give you their handle.
Reading needs no account. This is the one part that does.
Not what you have read, not your points, not what you scored on anything. Your circle cannot see any of that, and you cannot see theirs. There is no setting that opens it either — the database will not answer that question for anybody but you.