[Mithalwen]

I certainly would not want this thread to become a forum of speculation. Bear in mind that the old thread was closed for getting very baggy with posts about reps people had got and from whom.

I would say that an anonymous positive rep is either because someone doesn't realise that their name isn't automatically shown (as with PMs) or is shy. I know that when I started I felt almost presumptuous repping the great of the day - who was I as a mere newcomer to approve their posts. For whatever reason it is a nice thing - treat it as a Valentine. It is unlikely not to be reasonably obvious why your post was good.

Neg reps are different for the reasons above ....