Discourse signs up for email notificationspam by default

Apparently I have missed some setting on account creation and got [NixOS Discourse] Summary email with This summary is sent from [NixOS Discourse][1] when we haven't seen you in a while. Change [your email settings][17], or [click here][18] to unsubscribe. justification.

Is it really a good idea to opt-in people by default? (I unsubscribed, hopefully it will work)

I would be fine with notification specifically about my thread.

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