I was in the same boat. Especially since they request the offline data access permission. I finally relented by creating a crap Facebook account. I'd have been happier just giving them my email address and setting up a login in a more traditional manner.
"We're very sorry, but while we would love to let you in and rock out with us, we need to currently restrict turntable access to only the United States due to licensing constraints.
We are working very hard to try and get you in as soon as possible.
If you believe this is a mistake and you are located in the United States, please e-mail help [at sign] turntable dot fm