It's plausible that a world of ad brokers (with many smaller ad buys) is better than a world of few but very large ad engagements, vis a vis the Chinese firewal

It's plausible that a world of ad brokers (with many smaller ad buys) is better than a world of few but very large ad engagements, vis a vis the Chinese firewall. In that world, a single advertiser would have enough (purchasing) power over the newspaper, to the point where they could veto an article critical of that advertiser.