I have to disagree. It limits new entrants, as new entrants can't get into the large agreements easy enough to have a fighting chance. You mention sports, but

I have to disagree. It limits new entrants, as new entrants can't get into the large agreements easy enough to have a fighting chance. You mention sports, but that's a total anomaly, because upstart sports franchises are not common and they tend to be big entrenched players anyhow, due to the massive physical infrastructure required to run a league. Sporting events is just not a good example of why zero-rating should be any sort of norm. And I can't think of a good one.