While unfortunately, they are not functional on EMU, the good news is you can also pay for your Level 2 sub using Redcents. Just contribute to the forums, and you will earn enough Redcents to last a lifetime of Level 2. Take Sic here for example, if he blew his entire cache of Redcents on subs, he has enough for almost 44 years straight.
I typically earn enough to buy a few months of Level 2 in advance, some Krono here and there when they are on sale, sometimes subs for others occasionally, etc. Just contribute, and try not to be a jerk. I sometimes fail there...