I have just done it and gone through these steps and it works perfectly for me.
1) Went to
https://crossover.em8er.com/ember2ka
2) Used email same as i use for Em8er
3) Checked my email and copied code
4) login to
https://my.em8er.com/login
5) Scrolled down to the bottom of page left side, click redeem code
6) Pasted code in box and accepted, a successful message appeared.
Perhaps it works now?