Here's someone who recently sent 1 BTC to this ponzi scheme:
https://blockchain.info/address/1Gh2tRaqaPWFbQVabVD9rPsN1nm9...
https://blockchain.info/address/1BYbqzLvAN9PCC4LqNPPG2dHSyTn...
I'm going to watch and see what happens to them. If they don't lose their 1 BTC, then that's at least slightly interesting.
EDIT: It's been more than an hour; no repayment yet.