This is why I wish I had gotten into video game development rather than app development. Once the game is finished it is (for the most part) complete.
Take, for example, Crusader Kings II, a game released in 2012 that's still getting DLC and free patches subsidized by DLC sales to this day.
And there's also this infographic about day-one DLC that's been going around for a few years now: http://www.extremetech.com/wp-content/uploads/2015/08/DLCWor...