The article illustrates perfectly the smoke screen of de-fi.

Looking past the smoke screen - liquidity pool is a fiat, and/or stable coin, and or ETH deposit by an issuer of a token in order to support the token price when holders want to sell the token.

A new token issuer may need to put $20k deposit to get their token supported by a swap place.

Not much bying and too much selling will 'eat' quickly the deposit and the token need to disappear...