Coupon code on the back of business card no longer valid?

[Wojtek]

I've got this business card from back when I ordered my M402.
I tried placing an order with the coupon code on the back of it but it says the coupon does not exist.

 

[Ultra]

some codes do have a time limit on them...
you can always use the 'ecf' coupon for a 5% discount on all items in store,
except Silver Bullet, and BB's.