Why Instapaper Free is taking an extended vacation
How does he know nobody will buy the Android app?  I barely use any free apps other than the ones that come with Cyanogen Mod.Titanium Backup?  Paid.  ROM Manager?  Paid.  Treking?  Paid.  Android IRC?  Paid.  X-Plane?  Paid.Android users have no problems paying for apps.  Non-Android developers are afraid of the unknown.