But this seems to be Substack's official account: https://twitter.com/substackinc
Or just someone paying for the check & masquerading, so I can't be sure.
One platform is has a temporal advantage, and the other has a quality advantage.
No one is going to Substack for breaking news and no one is going to twitter for nuanced, quality perspectives.
Linking between the two is net positive, is it not?
No one should be going there for that, but some are, and Twitter doesn't want to pop that reality bubble.