Evernote Can But Dropbox Can’t?

Looking through the settings of the of the Evernote iOS app I noticed there is a link to preorder the new Evernote Molskine notebook. It looks like it just opens a webview and takes you to the Evernote online store were you can preorder a notebook. I’m not really sure how that is different from the Dropbox issue that happened a few months back.

The option to make a new Dropbox account in an iOS app led to a page that sold premuim Dropbox subscriptions that were not purchased using your iTunes account. I wonder if Apple is getting a cut from this “external mechanism” or if it just flew under the radar?