You are correct. There are no merit sources because he became a member before the introduction of merit and he got 10 merit for free, based on the level of his account.
He sent 1 merit but did not receive any.
Took a glance at his recent posts. He won't be getting merit anytime soon if he keeps spamming P&S like that.
I never really understood people thinking that P&S is of some sort of lesser quality on this forum. I would honestly think that the discussions going on at Politics and Society have a lot more meaning them conversations that occur in the Bitcoin Discussion, Services, Economics, etc.
Where these sections are mostly just a circle jerk about Bitcoin.
P&S is people going back and forth on certain subjects, it at least seems more lively.