The only reason why EVGA released 970/980 with blower style was because their custom solution wasn't ready yet and they wanted to get them out to customers/retailers ASAP.

I don't expect anymore blower style 900 series cards from EVGA.

I'll give you a hint   =   it's because the open style blowers are cheaper to make = more profit  = put slight bit more money into CS support
 
 
*Open style blower = ACX
*closed  =  rear exhaust
-They all blow , it's just whether they blow all over "open"  , or blow "directed" out rear

In the past, most higher-end cards were required to originally ship with blower-style models, as Nvidia required it for reference models of the cards.  After a certain amount of time, partners were allowed to offer different cooling options for cards.  As a result, it seems people now equate the blower style coolers to reference models.  I'm not saying anyone here has said that, but there have been other threads in which members have done so.  Blower-type coolers are still very good, and you'll likely see some with every higher-end card, but manufacturers usually prefer having other fans that generally cool better and have far better visual designs for branding purposes.  Also, as mentioned, they tend to be a bit cheaper to make.  As such, unless Nvidia requires it for models, you'll likely see fewer blower models in the future.
 
One thing to keep in mind is that Nvidia did not create a "reference" cooler for the 970's, as it did for the 980's.  Partners were expected to design their own to create whatever cooling solution they wanted, or use a previously designed cooler based on an Nvidia reference model.  Most partners created some sort of blower style cooler, and a few later created the Titan-looking cooler, as there was a demand for it.  Likewise, it seems like the 960 does not have its own special cooler, and Nvidia allowed companies to create their own out of the box, or use older reference coolers for the card.
 
This may be a trend for the future, and it may be a way for Nvidia to shave a few bucks off it's R&D for future models, or it may be a thing that happens with only the 900 series.  Either way, I'd expect at least one or two blower models for the higher-end GTX models, but the flexibility of the ACX or other custom coolers makes more sense for the partners.

I would love a card that had LED light s on the cooler (blower or aftermarket).  I thought the 780ti had the sexiest reference cooler with that green logo,...wish all cards had similar effects.