Yes, I'm logged in.
When I went to the program I was interested in watching, I was given two options: 1) Play Free Episode and 2) Try It Free.
Obviously, the first option allows me to watch *one* episode for free. If I select the second option it says "7 days free, then $6.99/month."
That says to me that, if I want to watch all seasons of the program, I have to pay $6.99/month *in addition to* the $6.99/month I'd pay for Apple TV. With tax, it would be something like $15/$16 per month.
None of the other apps I have charge additional money to watch all seasons of a particular program.