I looked up my US-PSN-account today and was surprised by a $10 voucher:

So is the money save forever after I added it to the PSN-wallet or will the $10 disappear out of the wallet if I don't buy stuff until November 30th?

An XBL voucher had an expiry date even after I added it to the wallet.

you have to redeem it before it expire on November 30. Once you redeem it, you are good.  

Edit: I dont know it it gets an expieration date once it gets to your wallet but I am sure November 30 won't be the expieration date once it is in your wallet.

Okay, thanks.

You should post the code so that I can verify that it still works.

Already used. To be on the safe side, I also already spent the money. There was another 10% code (one time use) in the "black friday 70%" deals.

Eventually I bought Star Wars battlefront for 2 cents. One cent for SW Battlefront and one cent for the X-Wing VR-mission. ;)

Thank you, Sony!

I read somewhere that Sony gave the $10.00 discount vouchers for those who bought the PS4 Pro. Is this true?

I got one of the codes 3 days after I got my PS4 Pro.  

I haven't gotten mine.  My Ps4 Pro arrived a week ago :(

Hopefully you'll get it soon!  You've got it hooked up and online, right? 

I got one. Had no idea why.