A NASCAR streaming service and a network television package doesn't have to be one or the other, it can be both. For an example, I have the Formula 1 TV app, which streams every second of on track action, and also has specially produced content that normally cover that weeks action and news of the sport. I really enjoy the app, it lets me customize my viewing experience as I can chose which broadcast to watch and switch between any car's on board camera at any time with the ability to listen to live radio traffic. It also has an archive function and I can watch races dating back decades. I can even, wait for it, turn off commentary and just listen to ambient sounds from the track.
However, I can chose to watch the race on ESPN on race day and not bother with streaming the race. I like that I have a choice. Hell, most premier dirt track touring events are steamed live nowadays.
I guess my point is, NASCAR owns the content, and similar to other sports, could start a streaming service to give fans more options to access their content.