That's not how any of this works, though.
Spotify has the same licensing agreement.
The difference is that Spotify has a free tier (lower revenue from those users), their users listen more, and they may also have more customers in lower-income countries with lower subscription rates.
Which is to say - of you took a specific category of users - say, US-based paying subscribers and kept their listening activity the same - every streaming service would pay out roughly the same amount of royalties per-stream for that group of listeners.