"Free Assets" serves as a way for new and/or experienced animators (from Sticknodes/Mine-Imator) to easily access free files and assets for their animations, like characters, weapons, and effects. As sometimes animators ARE truly good at animating! But they sometimes cannot find the right assets to show that.

Also yes, there are credits for whoever made the assets-- including original links if I provide my own (depending on where the original download area was that could potentially be unsafe).