Until November 7, registration in Windows Phone Dev Center of a private individual will cost $ 8 instead of $ 91.

To be very precise, not $ 8, but $ 91 with the return of the difference within 30-45 days.
Payment through PayPal for Russia is not available, only by card.
Windows phone dev center
I tried. After the first page there is no mention of a discount, they promised to take exactly 2,900 rubles. Registered, removed the authorization of 30 rubles. Further silence.
A source:
Limited offer for Windows Phone 8 developers - 92% discount when registering an account