Okay, went on a spending spree using the 50% discount code as today was the last day (bought over twenty books) and about halfway through (or shortly before) it kept on presenting an error...
Oh well, had to switch to paypal but it will be something that will make me think twice before buying books in the future if it doesn't get fixed since they seem to give me a worse exchange rate.
But if they have another great unlimited use code...all bets are off
