jnosnibor9 signed up on Aug 14, 2015 but never made a single post on any thread/forum and came back five months later on Jan. 2, 2015 and asked how to unsubscribe. I wonder if he/she was getting the weekly newsletter via e-mail and perhaps wanted to unsubscribe from it?
sangeetha signed up on Feb 2nd and never made a single post on any thread/forum and then asked to be unsubscribed the same day. Is it possible that he/she too had signed up for the weekly e-mail newsletter and decided they didn't want it?