App Marketeded with QR Code?

I'm looking into getting an app built for me, but I've been learning that it's not that lucrative of a business in regards to the advertisement in an app. Now other than the android market, as far as people finding out about the game, do you think QR codes are a good way? Now I'm not a big fan of the black and white codes, but I ran across at least two apps (FruitNinja & GroupMe) that had customized QR codes. They looked interesting, but I just want to know what are ya thoughts on sharing apps with QR codes?

Random enough I found the customized app QR's on tumblr?!? http://qrezy.tumblr.com/

Found their main site here

— modified on Feb 21, 2012, 10:48:21 AM

I understand. Well the QR codes can be a bit much, simply because they look exactly a like and most people aren't sure what they are scanning. Do you think customized codes could help at least for catching someone's attention regardless of ad placement?

Like I mentioned in my first post this company makes customized codes. http://Qrezy.com
I have never seen any like this. They seem to do more than just colors. They also offer something I've never heard of. They are talking about changing the code direction or something and make a code go to the app on android and apple. I feel as if the customized could help, It's definitely better looking than the black and white
I wonder if they scan just as fast though. More research.

Agreed. Still need good advertisement, which will cost a decent amount...huh.