PSA: Sportsfriends on PS4 does not support Cross-Buy

"If you’re looking to purchase Die Gut Fabrik’s Sportsfriends on PlayStation Network, then I would advise you to buy it on your PlayStation 3.

Aside from the fact that the PS3 version supports up to seven DualShock 3 and PS Move controllers for Johann Sebastian Joust, it’s also the only version of the game that features Cross-Buy, which essentially gives you the PS4 version of the game for free.

That’s right, for some peculiar reason, buying it vice-versa on the PS4′s PlayStation Store means that you won’t be getting it free on PS3." – Patrick Kulikowski