That last part doesn’t sound right but I wish it did.

Interesting. The link jumps straight to the article for me. No guessing involved. Yes, it’s mechanically produced ultrasonic tones.

Musk is the CEO of a publicly traded company (Tesla) and the CEO of a company that just recently sold shares on the secondary market (SpaceX). The valuation of these companies is wrapped up in market sentiment about Elon Musk.

every interaction that additional user makes with tweets viewed by those 100k existing users requires 100k updates pushed to those 100k users’ pages. Every like sends an update of +1 like on the tweet to every one of the 100k users. It becomes significantly more expensive per user engagement.

This is not how a reasonable API works and is probably not how Twitter “pages” work. A “+1” just changes a number in a database from, say, 629644 to 629645. The latter is no more expensive to send over the wire to a client when it requests data.