Scraping for one.

You don’t push feature like that for tens of millions to prevent some scrapers who bypass it in few minutes by creating account which is not providing anything to Twitter.

They account requirement is simple there for more efficient data collection.

And Twitter's business model is largely based on data collection?

Actually, yes. They sell data products and ads.

It doesn't prevent scraping at all, otherwise nitter wouldn't work either.

???? Firstly nothing prevents scraping. It makes it more expensive.

I ask everyone here to stop telling every word so literal

Preventing scraping is kind of the point of "Twitter is increasing the height of the walls around its garden".