I think premium is too expensive for my needs. So I found a way to use trials from time to time. Basically create a new paypal account every time you want sign up for a new Spotify 30 days trial...
Or pay the $10/£10 the times you need it and cancel the subscription straight away. Seems like an awful lot of work to setup PayPal accounts to avoid paying $10. I understand that can be a significant amount of money for some people but why is it so important to have Spotify from time-to-time that you would go through that process?