Why would a sponsor pay for an ad if they know nobody will watch? Its not magic money out of nowhere; the sponsor has to come out net positive or else they stop sponsoring.

Or, historically, when you’re building a new factory, the first thing you do is build a rail connection right next to it

It’s owned and populated by history and science/engineering YouTubers, so if you’re not usually watching that side of YouTube, you might not find much on Nebula for you.

Name an industry where a private corporation competes with a local government monopoly?