Yes and no. A
That's kinda true, but there's alot of differences.
Joe would be a guinea pig, but he'd be one of many guinea pigs Amazon is putting out there. DJ Khaled, Will and Jada, and Dan Patrick are all doing shows with Amazon, and they have exclusive deals with alot of other pods.
Also, Joe almost certainly will get a deal closer to what he's looking for with Amazon because they have so much cash on hand. Spotify relies on their streaming content and investors to bring in money, while Amazon has revenue flying in from damn near everywhere. Amazon doesn't give a fukk about having ownership of a rap podcast, whereas Spotify has to be more careful with it's money.