Algorithm, yes. Database, hell no lmao. Those are two different things when it comes to making a website. Algorithm is the code that gives you what you want to see or gives you suggestions of what you might want to see, among other things. The database usually has the assets of the website, basically the layout of Twitter. Substack, allegedly, was downloading the database to make their own "fork" of Twitter, or maybe make Substack it's own Twitter. Either way, Musk banned the IP that was downloading the database and that IP was Substack. So from what I presume, Twitter probably automatically filters that IP as malicious, which is why everyone is having problems with links to Substack, because the IP used to download that database was from Substack.