Not that I am a fan of charging more money at all, but they aren't doubling it exactly. The subscription cost is based on a fixed number of euros converted by based on the daily rate.
Todays conversion is:
Subscription: *
2 Month - $12.24
6 Month - $32.55
12 Month - $59.01
$2+ for a 2 month
$3+ for a 6 month
$10+ for a 12 month
It still sucks that they would take advantage of a struggling economy.