I am not sure if it was posted before. just checked graysonline site, turns out, if you are signing up for the first time, they give out $40 voucher (min spend $80). i got mine but i believe it is a unique code. let me know about your thoughts.

PS: hope it works for everyone this time :)

EDIT: I think you will need to put your email address onto subscribing section and you get an email with a voucher code. and then you need to click the "set a password" on email then go from there..