I expect at least a link to download your app. The logo and name on the top are only a gift and text, (I think that) they must have links to the app or your main webpage.

Also, there are many dupes or quasi-dupes. For example, all the Facebook pages look alike. They probably require some login information to provide the image. The Youtube pages also look similar. They need more render time to get the main a good image of the video.

Also, is there any privacy concern? DO the users know that the page from the QR is made public?

And how do you filter NSFW content?