Bring me different rocks

Scott Kirsner summarizes a new book "Mastering the VC game" and re-tells a funny VC scenario:

"He also talks about an exercise called the "rock fetch," when VCs ask an entrepreneur to spend time finding other investors willing to join them on the investment (bringing them "rocks"), but then decline to collaborate on a deal with those investors ("bring us a different rock.")" (from Scott Kirsner)

Ok, not really funny. More sad depressing poignant familiar...