Coupon code not working?

Hi
I have been emailed a coupon from invisionize which is supposed to give me free copyright removal, however when entering it in your checkout I get told that the coupon is invalid. Is this coupon still valid?

I also (currently) run five websites (only one of which uses subdomains) on a dedicated server. I have read elsewhere that you are planning on creating a whole server licence if buying that ends up costing less than I would spend on the five licences would I be able to get refunded the difference and convert my licence? Also, is there an ETA on getting subdomains working? I only have one subdomain on one of my sites so an extra $20 for an additional licence isn't a major problem at this point in time, however there is little point in buying it if you will be updating in a week or two.
My next question is about addition licences. I have read that it will cost $20 for an addition licence, if I use the copyright removal coupon (if of course it is still valid) will that be counted for my four additional licences as well?

My last question... Do you have a test website with the script running that contains some buggy scripts with well known exploits we can use to test this scrpt out before buying? What you are claiming this script is capable of seems almost too good to be true for the price...