It is added to certain accounts/devices to make them compatible with Sprint's newish ringback service by Real Networks. Real sync soc is free soc that enables synchronization of digital media services though Real networks. (music store plus)
Controls ringbacks, music purchases, etc. Ringbacks have always been available. It is the music that callers hear instead of ringing. Apparently the code is needed for the syncing to work. It does not need to be removed as it is just an account SOC and has nothing to do with your bill. No notice was given because there is no affect on account. It was done in the backend.
This information was copied from a post by Ray. Hope you don't mind Ray.
Some type of employee discount? Sorry I couldn't find much info on that.