Why did the International Game Developers Association need to make a Katamari-style ball of junk? We have absolutely no idea. We'd imagine the answer is, as George Mallory said of Everest, "because it is there." ... Or maybe, more accurately "because a bunch of junk was there ... and glue was there ... and so was free time," even though we can admit that answer leaves one wanting in the panache department.
What did we leave on the ball? Why, our plane tickets, of course. Charity doesn't count if it doesn't hurt.