I am told that Hollywood financial accounting is … weird. It truly depends on the production costs, plus the royalties. A google search puts Samuel L. Jackson at about $6,200,000 per movie, or 1,550,000 paid subscriptions to pay just for his salary. Jennifer Aniston is at $1,100,000 per episode, or 275,000 paid subscriptions per episode. Add other names such as Reese Whiterspoon or Jason Momoa and the price goes up quite substantially.
This is even before actual production costs (pre-production, director, tech services, post production, CGI etc. and, again, royalties. PLUS the actual service's costs such as servers, programmers, lawyers etc).
I am starting to think that ATV+ is just to sell more devices as a "free" service included with the purchase.