I usually watch one game a weekend, but if I wanted all of them, I would have three options. First, I could go to a sports bar. It's fun, social, and costs whatever I would spend on food and drinks. Option 2 is to give Youtube $400 a year and watch whatever games they want to show me on multiview, because I don't get to pick. Option 3 is I don't give Youtube $400 and I stream whichever games I want to watch for free.
I'm not surprised they have millions of subscribers. A lot of people don't want to go to a bar, and a lot of people don't have the patience for piracy. But the product they are putting out should be better than those options. They should offer features the make it worth $400 a year. Otherwise, they overpaid for the license.
I paid for it and I quadbox the games I want to see and redzone. It's nice not having the low resolution and streams that are not stopping all the time. Bonus is you can rewind or watch all the games when you want to. Totally worth the price.
Redzone is worth it, but my wife is a Lions fan (for life) and they are never televised in our area, so Sunday Ticket is the only means she really gets to see her team.