No 'greyed out' mags for me, either. Maybe only for US citizens?
And...weird - I bought a mag and it charged me in US $ through the US site. Then I bought a subscription and it charged me in CAD $ through the CAD site. Maybe it depends on the mag?
Also, when I bought the mags, it got me to do this weird security thing at the end of the purchase - which failed after I entered my password, but I still got the mags and my paypal account was still charged fine. Weird...