Neither code works
For all of the reading of T&C that ones does, it did not seem to be a targeted e-mail (which is where I got those codes) as I've received other e-mails from them before (like $30 off $100) and it says from clicking that e-mail only and signing in with the e-mail it was sent to. It did not say that in the e-mail I got.
Looks like you can get 10% off by signing up for their e-mails if that helps or maybe they'll send out the 15/20 e-mail when you sign up since it's BF.
I was so excited for the group and now..well,