Не знаю, куда лучше писать (может сразу в КСВ? ), только что пришло следующее уведомление:

Lifetime Dev Center subscriptions

Starting September 16, 2014, all Windows and Windows Phone developer accounts in Dev Center will transition to a one-time only Dev Center registration fee.

With this change, you will no longer have to pay an annual renewal fee to maintain your Dev Center account.

If you recently received an account renewal notification via email or in your Dev Center dashboard, you can ignore it as it was generated prior to instituting the change.

All current Dev Center accounts will continue, without interruption. For more detail, please refer to today’s announcement for further detail.

Thank you,
The Windows Store team