In the P2P world, things don't just spring back, they multiply with each attempt to shut things down. Private BT sites refer to this as "the hydra" - every head you cut off spawns several more. As an example, shutting down Oink spawned What.CD, Waffles.fm, and 2 or 3 other sites - What.CD and Waffles.fm are still going, and What.CD's codebase is powering dozens of niche sites such as LZTR (classical music and video game OSTs).
