There is no cap on advertising bandwidth. You can advertise on your on body and walk around the town. But bandwidth is limited and prioritizing one over the oth

There is no cap on advertising bandwidth. You can advertise on your on body and walk around the town. But bandwidth is limited and prioritizing one over the other isn't a "open system". And the traditional businesses of course aren't "open".. hence the much higher barrier to entry and success than on internet.