Nokia Lumia 900 - Why don't I find Skype for Windows Phone 7 in Marketplace?

Skype support for Windows Phone 7 has been discontinued and the app is no longer available for download at the Marketplace. For more details, refer to the Skype support site (https://support.skype.com/en/faq/FA34489/is-skype-for-windows-phone-7-being-discontinued).