Im guessing EVGA probably cancelled all orders for 980 SC so they could apply the price hike.
The GTX 980 SC Reference Cooler card was being sold for $569 - and once the stock went out - they stopped supplying.
Now they've hiked up the price. The new shipment that will probably come after all pending orders are cancelled and the card will be re-shelfed as a new product with new price. Hence vendors claiming it to be 'discontinued'. It would probably show up on their shelves as a different item [i.e. different product code].
I'm just guessing here - but thats how it seems to me now.