It’s just a pointer to a useful site today. OpenGameArt has been around since at least 2009, a place where people can upload game assets they’ve created and make them available to developers, with a variety of licenses. Back in 2013 I used music from it for my own Gamemaker game Octropolis, properly credited of course.
Games made with freely-available resources sometimes get a bad rep, but they can be invaluable for small-team and single developer projects, or anyone trying to get their project off the ground.
