What happens if you enable another promo code

Right now I have a 3 month pro membership, but I got another 1 year pro membership for being a finalist in the epilog contest.  What happens if I enable the 1 year membership.  Will it just add on, or will is "erase" the 3 months, and just be a year?  I am pretty sure that it will just tack on, but I just wanted to be sure that there wasn't a bug. 

Thanks in Advance!
(soon to be TTR)

Kiteman6 years ago
If you activate the code, it will add the time onto the end of any pro membership currently running.
ElvenChild6 years ago
someone got 2 years and 9 months of free pro memberships they said after that they could not add anymore