They’d have to host it from somewhere not related to Meta in any way, otherwise someone on the fediverse would find that link and spread the word, and it would be blocked the exact same way. It only takes one person making that connection, Meta knows they’re hated.

The point they’re making is that they don’t need to scrape the data. It is available via federation. Scraping the data is less efficient and can negatively affect the platform performance, versus the built in federation system where that data sync is intentional.

Especially when Meta has a fediverse presence. The reason they’re scraping is likely because instances have blocked theirs, in part to prevent this exact thing.