Can you stack PS4 codes?

[dragoonblade]

I've seen this question floating around the internet and I gotta admit it's an interesting question. Can you stack the free 30 days trial included in the box with the 7/14 days trial included in the games? Has anyone tried doing this yet with good results? Or does Sony prevent you from doing it?

 

[themarting]

If its anything like the xbox 360 codes it should work...