I think everyone gets the same coupon code and it's only valid once per account.

For me it's not worth me spending $35 USD plus exchange rate in order to save $3.50.

I'd prefer if they lowered their minimum to $10 or $15.00.  Or they could do it in steps.  10% discount for X dollars spent, 20% for X dollars spent, 25% off for X dollars spent.

More people would probably take advantage of it then.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi