If you read the page it's pretty round about to get there though. It's buried in the last line of the description:
> P.S. — Proceeds from this campaign will be used to buy a controlling share of Twitter. If we can't get a majority interest, we'll explore options for buying a significant stake in the company and champion this proposal at the annual shareholder meeting. If that's impossible for any reason or if there is a surplus from this campaign, 100% of the balance of proceeds will be donated to Global Zero, a nonprofit organization leading the resistance to nuclear war.
So the whole thing is a marketing gimmick by Plame. Shocker!
