My first instinct would be to visit
www.icloud.com, log into the site with my Apple ID and see what's there.
There are iCloud preferences in both iOS and macOS devices, those would be alternate places to check.
Disclaimer: I do not have any iCloud subscriptions, so there is nothing to note at any of those places when I log in.
I do have an iTunes Match subscription as well as an MLB At Bat subscription. I believe I've seen both of those on iTunes under some account subscription link or menu.