I didn't see this posted already, but I could have missed it :).

Article: http://www.playstationlifestyle.net/2016/10/06/green-man-gaming-ps4-now-selling-digital-games/

Green Man Gaming is now selling digital codes for some PS4 games (NA region only). They will also soon be selling Nintendo 3DS, Wii U, and Xbone codes too.

ETA: PS4 games currently have a nominal discount of 5%: https://www.greenmangaming.com/titles/sony/

That's potentially good, especially if they start doing 3DS and Wii U codes, but it'll need some big discounts for me to use their service instead of the regional eshop and PSN instead.