Priority Club changed what points are elite qualifying starting on January 1, 2013. You can read my piece about this change here. Previously, almost all points deposited to your Priority Club account were elite qualifying ones.
I wrote a piece back in January that points purchased via Buy Priority Club Points that is handled by this party Points.com are elite qualifying and they most definitely were at the time. They are no longer. You can see from the screenshot above that the purchased points didn’t change the number of elite qualifying points earned in 2013.