I saw some people here asking "How do you make money with QR Codes?" and they wondered how to sell them to customers.
Well, of course you cannot sell a simple QR Code which you have created with 2 clicks, but you can design QR Codes in order to make them look nicer and sell this service.
Of course you have to make sure that the QR Code is still readable.
Look at the fiverr gig i have just created: daikoku: I will create a cool eye catching QR Code design for $5 on fiverr.com
Those custom designed QR Codes are great for upselling, especially if you are selling mobile websites.
You are not a designer? No problem. I can do the work for you and you can sell it to your customers.