The evolution of gaming profit schemes
This page is a draft and pretty much a work in progress. Expect things to change a lot.
Free to play
Games started out as very simple computer programs. To enjoy them, you would need to type the entire source code on your computer before running them.
Most of these machines had no persistence, so you had to type the source code every time you wanted to play the game.
Buy to play (plus shareware)
NFTs and blockchain based currency (also called Play to Earn)