These two fields allow to specify a different default assignee for ticket opened against this package in bugzilla. Note: The EPEL field is always displayed for packages in the 'rpms' namespace regardless of whether it is used in bugzilla or not.
Twitter now requires OAuth authentication. See README for how to set it up, and get the required keys from bti's source tree here: https://github.com/gregkh/bti/blob/master/oath.keys