At Spotify, purchase a Spotify Premium 1-Month Subscription at $9.99 and receive two additional months for free. That's only $3.33 per month. Spotify Premium features offline access to playlists and no advertisements. You can cancel the trial at any time; otherwise, your card will be charged $9.99 for each additional month thereafter.
Most taxpayers will see their tax bill go down during 2018. That could impact which type of account -- traditional or Roth -- makes sense for you.