The free-to-play games.
Regurge parodies Cyndi Lauper's Time After Time. This Flash game/video was created in year 2000, when Internet speeds were abysmal compared to modern ones, and loading this 2Mb file could take quite some time.To remedy that, Flash allowed the content to be interacted with way before the file has been completely loaded. In this video, the button in the bottom right corner of the loading screen launches the Pong-like mini-game the user coud play while the file was still downloading.