TV: Only regular NBC sports package channels and no Extra Time channels (at least not live). You can also stream the games that are on the regular NBC sports package channels, though.
Streaming: Subscribers to the NBC sports package can stream the games that appear on those channels. To see the other ones you have to get the $49.99 service. BUT, the streaming package doesn't include the games on the NBC sports package channels, so if you're a streaming-only person, you've got to get them through another streaming services that includes the NBC sports package (like Sling, apparently).
I think.