Says for those who are new to Spotify premium. May work with current accounts. I’m not sure. Let us know in the comments.
Spotify Premium
Hulu (ad-supported) plan
Open only to users who are new to Spotify Premium. Offer includes access to Hulu (ad-supported plan). Existing Hulu-billed subscribers who have Hulu (ad-supported plan) without add-ons are eligible if billing is switched to Spotify. Limited quantity of offers: open until Jun 10, 2019 or while supplies last. Other conditions apply. Read full terms here.
https://www.spotify.com/us/hulu/
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