I wrote another article, this time on digital distribution storefronts for games.
This is the big one, and it has a de facto monopoly on desktop-game sales.
After the discontinuation of Steam Greenlight, publishing on Steam has become very straightforward, with only a one-time US$100 fee necessary per title published. This fee can be recouped once a game has earned over $1,000, which can be a lot for minor titles though.
The open gates have led to an inflation of games on the platform, which sadly means that publishing a game on Steam no longer automatically guarantees success.
Go check it out!