I have often liked QR Codes and thought they may become big.
But while I see (or did see) them on many adverts, Iam not sure they took off, and now I see them less and less.
That was untill they have stated in the UK that they will be on everyones energy bills.
http://www.bbc.co.uk/news/business-26509405
This is a game changer as it will get many many many people using them in the UK.
So mabe this could be a new re-birth of the qr code.
And why should the porn world love qr codes?
Simple:
Have a qr code on your pics and it can point to your mobile phone version of the site.
So how about this for an idea. Provide your affiliates with there affiliate code auto genertated in the pics you let them use.
Surly this would not be difficult for somone to make somthing so the code can be generated automaticly for affiliates.
With url shortening and have each pic have a different tracking code, you can see also which pics works best.
Just think about it on such at tublr. Often they shut accounts that have affiliate links, but if the qr affiliate code is in the pic, then it cannot (I belive) be detected. And so account not closed.