I heard that one company buying all the product or a majority of the product is called a monopoly practice.

  If a dominant buyer locks up most of the supply chain through exclusive contracts, it prevents rival companies from getting the materials they need to survive, which violates laws like Section 2 of the Sherman Antitrust Act.

It's called a monopsony[1], regardless, antitrust regulation is famously dead under the current US administration.

[1] https://en.wikipedia.org/wiki/Monopsony

Regulation is dead under this current US administration (unless you pay a bribe). It's so weird this is where we are right now and most of the tech leadership has to play along even though it's technically illegal?

> most of the tech leadership has to play along

Many of them orchestrated the situation.

very cool word, but I think the etymology stated in Wikipedia is wrong.

the second part of the word just means purchase (in a weird ancient Greek tense). there's no relation to fish whatsoever.

(I'm Greek)

Antitrust has been dead for decades. It spans administrations and parties.

Under Biden they at least tried