It is still applying for regular versions of games for now...but I wouldn't be surprised if they start phasing it out.
I contacted CS the other day about applying the discount retroactively to a new game I had preordered and shipped that I realized never had the discount applied (Moss), and the guy on the phone told me not all new games were eligible and it was up to me to make sure the prime discount was on the product page before ordering. Dunno if this is standard procedure now or I just got a bad/lazy rep.
I called twice on Moss two days ago. I pointed to their FAQ and Terms for the discount that it should be applied to the game. My case was forwarded to the Promotions Team and I was given a refund for the 20%. Keep trying.