Sharing passwords for Spotify accounts is not uncommon and the latest way the company is trying to crack down on the practices is by introducing a shared premium service for two users. Premium Duo, will give each person a separate premium account with all the standard benefits as well as the new Duo Mix feature. The new offering is more cost effective compared to single premium accounts which go for $9.99 each and falls in-between the regular premium account and the family sharing plans, which start at $14.99. The only requirement for Premium Duo is that you're living together with the...