So, recently I learned of CrowdSound, a yearlong project that has successfully, note-by-note, composed a melody based on the votes of over 60,000 participants. While the end result does get a fair bit repetitive and uses perhaps the most elementary chord progression ever, it's honestly not half bad and still really neat either way.
And hey, if you find it as cool as I did, consider participating yourself! There are still lyrics to be voted upon!