En Masse has added a new wrinkle to its TERA cash shop. The next time you log into the free-to-play fantasy brawler, you'll receive a pack of five federation bills for your trouble. You'll get five more on each subsequent login "for a limited time," and En Masse will be "introducing more and more ways to get them" in the future.
The bills aren't tradeable, but you can share them across all the characters on your account. They're used at exclusive merchants in towns spread throughout Arborea to purchase "some of those rare items no longer available anywhere else" as well as "plenty of other goodies and treats."