Correct. Facebook, Google and Apple are good examples of companies that made billions by taking technology developed by others and then tweaking and adapting it to reach a mass audience.
MySpace paved the way for Facebook. Earlier search engines like Lycos and Alta Vista gave Google the opening they needed. And remember those crappy MP3 players before the iPod that took you half an hour with third party DOS-based software to load a playlist of about 18 songs?
