I honestly never check the forums, so if this has been requested already, feel free to ignore or delete this post.
There is already a feature that allows you to see which service has the content you are wanting to watch. My thought is to expand on this. A user goes to their settings and checks the boxes for the streaming services they are currently paying for. Trakt knows what shows we are watching. By using that data, Trakt could recommend you cancel a service if a show you’re watching doesn’t have new episodes coming out. For example, I just canceled my Paramount+ subscription because Yellowstone is on a hiatus until November of this year. I’m not too good at keeping up with these things on my own, but if Trakt told me “hey, you’re caught up on Yellowstone, and no other shows you’re watching are on there, you can cancel” back in January, I would have saved like $60.
Trakt knowing what services we currently pay for could be used in another way too. To save time and taps on clicking the “Watch Now” button, the icons shown there (like Paramount for Yellowstone) would only appear IF you have that subscription. You’d be able to see at a glance if you can watch the content with your current subscription set up.