Hi All
I've been following this thread with great interest as I intended to subscribe to FindMyPast. 
On 16 December, I bit the bullet, entered the promo code Santa14 and subscribed to World membership for half price.  I got an email receipt saying everything had gone through and I had World membership until December 2015.
Fingers crossed I haven't spoken too soon, but everything seems to be fine.  
Kind regards
Caroline