The secret token key published here is the original key generated by Rails, but it's not used by production environments. The system uses a method similar to what's proposed here (diaspora) based on Capistrano.
The facebook Id and keycode isn't used by the application and refers to a kind of 'dummy' account that is never used, so those Ids will be cleaned-up. In any case the keys will be managed using Capistrano scripts.
For payment credentials, this refers to a test site in a test mode.