I once have seen someone talking about this idea of army collecting money and creating familly spotify to share between them as it will cost less etc.. PLEASE NO !! do NOT do it !! Spotify' policy is really strict about this. If a familly spotify account is used by people with different IPs, the account will be automatically shut down and all it views deleted !! So here is a tutorial i found on my tl (c.owner) that perfectly explain how to CORRECTLY stream on Spotify.