No, it's not a premium feature. The premium feed platform hasn't been offered to the public yet.
You simply connect your scanner to the computer with an audio cable and data cable, then setup the software to send tags along with the audio. There are specific scanners that each software package supports, so you need to make sure you have one of those models.
ScannerCast supports: GRE PSR-500, PSR-600; Uniden BCT15, BCT15X, BC346XT, BCD396T, BCD396XT, BCD996T, BCD996XT, ; Radio Shack PRO-106, PRO-197
RadioFeed supports: GRE PSR-500, PSR-600; Uniden BCT15, BCT15X, BC250D, BC296D, BR330T, BC346XT, BCD396T, BCD396XT, BC780XLT, BC785D, BC796D, BCD996T, BCD996XT; Radio Shack PRO-18, PRO-106, PRO-107, PRO-197