In an era where digital publishers treat their hosting platforms as permanent fixtures, Casey Newton delivers a startling verdict: the infrastructure designed to empower independent journalism has become a liability to its core mission. This isn't just a migration story; it is a forensic audit of how a company's growth algorithms can quietly amplify the very extremism it claims to merely host.
The Illusion of Neutrality
Newton begins by dismantling the myth that Substack was ever a neutral utility like a web host. He recalls the early days when the platform offered healthcare subsidies and legal support, creating a sense of partnership. "In the three years since, Substack has been a mostly happy home," Newton writes, acknowledging the genuine growth Platformer experienced under Substack's wing. However, he argues that the relationship shifted fundamentally when Substack stopped being a passive landlord and started acting as an active promoter.
The crux of the issue lies in Substack's new tools, which actively recommend content to readers regardless of their existing subscriptions. Newton points out that these features are not benign; they are engines of rapid expansion. "I believe we have seen firsthand how quickly and aggressively tools like these can grow a publication," he observes. The danger, as Newton frames it, is that the same machinery accelerating a newsletter's reach can just as easily turbocharge hate speech. The platform's laissez-faire approach to moderation, once a selling point for free speech absolutists, now feels like a gamble with the public square.
Critics might argue that Newton is overreacting to a handful of bad actors, suggesting that the market should self-correct without heavy-handed intervention. Yet, Newton's analysis suggests that in a networked environment, the market does not self-correct; it amplifies. The infrastructure itself is the variable that changes the outcome.
Substack's tools are designed to help publications grow quickly and make lots of money — money that is shared with Substack. That design demands responsible thinking about who will be promoted, and how.
The Failure of the "Bare Minimum"
The narrative takes a darker turn when Newton details the platform's response to the presence of Nazi propaganda. He describes a moment of clarity when Substack co-founder Hamish McKenzie insisted that censorship makes problems worse. "We don't think that censorship (including through demonetizing publications) makes the problem go away — in fact, it makes it worse," McKenzie wrote, a stance Newton initially found frustrating but understandable.
However, the situation deteriorated when Newton and his team identified specific publications advocating for violence and genocide. The platform's response was not a principled stand, but a bureaucratic shrug. Newton recounts how Substack shared his findings with a friendly publication to downplay the severity of the issue, framing a systemic failure as a minor glitch. "The point of this leak, I believe, was to make the entire discussion about hate speech on Nazis on Substack appear to be laughably small," Newton writes. This maneuver revealed a deeper rot: the company was more concerned with managing its reputation than upholding its stated policies against incitement.
The administration of the platform, in this case, failed to draw a line even when presented with undeniable evidence. Newton notes that while Substack eventually removed five of the six flagged accounts, they did so without committing to a proactive policy. "Substack's removal of Nazi publications resolves the primary concern we identified here last week," Newton admits he wrote at the time, a statement he now regrets for being too generous. The reality was far starker: the company did the bare minimum, leaving the door open for the next wave of extremism.
The Slippery Slope of Infrastructure
A significant portion of Newton's commentary addresses the fear that moderation is a slippery slope. He dismantles this argument by pointing out that boundaries are constantly renegotiated based on values and threats. "The slippery-slope argument here is based on the fantasy that if you simply draw the right line, you will never have to revisit it," Newton argues. He suggests that avoiding this work is exhausting and expensive, which is why many prefer to shout about the slope rather than do the hard labor of defining it.
The choice to move to Ghost, an open-source platform, is presented not as a perfect solution, but as a necessary step toward a different kind of infrastructure. Unlike Substack, Ghost has no plans to build a social network or recommendation engine. "Ghost tells us it has no plans to build the recommendation infrastructure Substack has," Newton explains. This means that even if hate speech exists on Ghost, it lacks the algorithmic fuel to spread virally. The distinction is crucial: one platform is a marketplace with a megaphone; the other is a marketplace with a quiet corner.
We have seen this movie before, from Alex Jones to anti-vaxxers to QAnon, and will not remain to watch it play out again.
Bottom Line
Newton's most compelling argument is that the architecture of a platform determines the nature of the discourse it hosts, regardless of the individual writers' intentions. His willingness to walk away from a lucrative, high-growth ecosystem to protect the integrity of his work sets a powerful precedent for the industry. The piece's greatest vulnerability is the uncertainty of whether a smaller, less feature-rich platform can sustain the same level of independent journalism without the promotional boost Substack provided. However, the verdict is clear: when a platform's growth model depends on amplifying all voices equally, it inevitably amplifies the most dangerous ones, and the cost of that amplification is too high to ignore.