> These 570k users only listened to audio, seems like the biggest waste ever. Cuban got a bunch of (undeserved?) money and Yahoo lost the same amount. Feels like a pointless transaction

These were the heady days before the dot-com bubble burst. In April of '99, Pets.com had just IPO'd (February) and Webvan was a going concern. The 'information highway' replacing traditional radio was believable enough. I don't think at the time anyone knew it was a waste. Hindsight is 20/20.

Offtopic: Only today did I put 2 and 2 together on the inspiration for Silicon Valley's Russ Hanneman "I put radio on the internet" joke...