A simple offer and a one page complete signup conversion.   Not to mention the subscription promo of a makeover contest.  I like the addition of the communication preferences right on the main subscription page.

Would you like the once in a lifetime opportunity to win a makeover with the editors of Vogue, the world's fashion authority?

via Condé Nast Magazines: Vogue.

Notice too the focus of the page on the subscription conversion and no other content or alternate links except for terms items.  Good job on the subscription page Vogue!