This statement also carries so many implications. Is the Twitter database public? Can I also download from the Twitter database? Has Twitter now had a data leak? Does Substack just use a single IP that Twitter has... blocked?
Substack’s CEO has denied any improper use of the Twitter APIs. Given Elon’s long and storied history of making things up, this allegation seems likely to be another fabulation.
Well, is scraping Twitter an improper use? Anyone can see tweets and who follows who - that's public. Twitter might consider a nascent competitor trying to scrape a significant fraction of the whole thing unfriendly though.