I've sent email followups to acknowledge/thank folks who wrote really high-effort reviews/quality reviews for me as an AE/AC in the past and I've always been surprised by how much reviewers seem to appreciate this. I need to remember to do this more often.
Checking that little box in the PCS is for @ACM_CSCW, @sigchi is nice too (ACs should use it!) but doesn't really replace the whole acknowledgement from another human thing.
This acknowledgement from @opensym reminds me that I should do a better job of giving this kind of acknowledgement for folks who agree to do reviews for me.
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