Here's a pretty interesting promotion from Sony. They are doing a PlusMoments initiative where if you share some of your favorite cool clips via the Share button, you can win some prizes.
Prizes can range from PlayStation 4 controllers to game cards and even some game specific swag. Share your clip, make it public, tag #PlusMoments with the Challenge title, and have your PSN ID visible in the clip to register.
There will be game specific Challenges it will be limited to owners of said game for that specific Challenge. Still, if you're playing and want to try your hand at winning some free stuff, it's pretty simple to enter.