I'm "pulling this from" the settings on my browser. When I look at the check box in preferences it's unchecked and greyed out.

I then check about:config and dom.private-attribution.submission.enabled is still set to true.

Looking at the Mozilla wiki (https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_...) I don't see any discussion of telemetry as controlling this behaviour.

It is not clear to me what is going on or what the state of this feature actually is. Have I opted out or haven't I?

After the initial complaints they must have known it was controversial. I stand by my original point, they could have been much more upfront about this.