some of the articles go into detail on specific trades (with the number of shares) that actually happened at $0.01 (or $0.000001 or whatever the number is that is meant to represent $0).

so it ultimately looks like a factor of events caused some people's simplistic trading programs to give away their shares for free, and the people smart enough to buy them up at near-zero did.

that's my best guess at this point, anyway. looking forward to hearing what actually happened :)