Substack has been used by writers as a platform to share their work and ideas with the world, with the opportunity to acquire a following or subscribers. Writers use it to share recipes, stories, research, analysis, and more.

Because of the richness and variety of content you can find on Substack, many users take to Twitter to repost their favorite Substack finds or even their own work. 

As of last Thursday, that came to an end.  

Starting on Apr. 6, anytime a Twitter user wanted to share a Substack link, they were met with an error message saying, "Twitter has unexpectedly restricted access to embedding tweets in Substack posts," according to reports.

Also: Twitter adds an enticing new Twitter Blue feature

On that same day, Substack took to its Twitter account to assure users that it was investigating the issue and would update users with any new information. 

On Friday, the founders released a statement on Twitter expressing their disappointment with the circumstances. 

A statement from our founders:
Any platform that benefits from writers' and creators' work but doesn't give them control over their relationships will inevitably wonder how to respond to the platforms that do.

- Substack (@SubstackInc) April 7, 2023

Despite users sharing their experiences online with screenshots, Elon Musk took to Twitter on Saturday to deny Twitter's involvement with Substack Tweets being blocked. 

Interestingly enough, he did mention Substack's Twitter clone, Notes, which people speculated is why Twitter blocked Substack in the first place. 

1. Substack links were never blocked. Matt's statement is false.
2. Substack was trying to download a massive portion of the Twitter database to bootstrap their Twitter clone, so their IP address is obviously untrusted.
3. Turns out Matt is/was an employee of Substack.

- Harry B