That seems like a shortsighted way of looking at things. Sure, they may be able to pick a few extra bucks from the streaming services, but how many long term fans are they eventually going to turn off by doing that to them. I like the NFL, but eventually it just gets to be too much.
I normally pay $100/year for NFL+, but they won't even let me see the game on that, unless I want to watch a 3 hour game on a 3" cell phone screen. It gets ridiculous after a while.