[Peroni]

I can see the value in having a pointer to get people to your app, I can see that a URL distribution method like a QR code is an appropriate method, but doing it in a card shaped like an app icon is a gimmick, and will create small annoying pieces of paper for people.

If they are handed out surely you can use something more effective, like a QR code on your device snapped by their's and if they are to be left somewhere they will be too small to be an effective call to action.

As ever I find myself thinking that promoting apps with pieces of paper seems like a compromise solution ...