Earlier quoted context omitted.
"Well, I am just glad that Android, Windows Phone and Windows 8 store apps don't have this stupid restriction if you don't use their payment systems." The Android Developer TOS says that any other in-app payment system isn't legal, and grounds for your app being removed from the app store. I haven't studied it, but I suspect Microsoft's ToS will say something similar too. Edit: Android's DDA section 3.3 and 4.5 disal…
Do you have a link to or a quote of that section of the TOS? I just looked through it and couldn't find anything like that.
Sections 3.3 and 4.5