There ain't no such thing as a free lunch
This phrase is like a proverb or aphorism emphasizing opportunity costs and trade-offs.
It's often used in economics and popular culture to express the idea that everything has a cost.
If people want to make money in the protocol, they can do so, but they have to have skin in the game.
Skin in the game is a figure of speech by the way.
RE: Me last word.