For example the op of A Bit Ponzi has stolen 0.6BTC and set it off to places beyond.

https://blockchain.info/tx/bb9bf8bcc0dff2ed9cc6c1b7618d136963a437839d16c793c18d638dd42ed36f

Unlike the many other instances where investors in a Ponzi have lost funds these funds were taken unjustly without cause by a now thieving and scheming parties.  They be reported to authorities.
Complaint Id: I1502120543572562

The following look to have been refunded:
000879391b4fbe9b6795fe28f256c26a21e620d987cc5f60a8d0b29841a27f1f   0.2BTC
de07b171725944d138abf7b7aa7813b44863872c4e51b7cd7ae2307edbce50b0  0.2BTC
52862e2c1a6704c8f14d65b49b8d715d112a6546886b36059165fafd633b71d1  0.2BTC
f7a3d76b0723f674b91e6ebe008f2a55285499b5859232eeeafdd0115566209a  0.2BTC
c6fb5f0b149a71eb3efcaf7974012f5db01593612cc992f5b2a27c2f0bd4e31e  0.2BTC

However there looks to be no refund to:
1Exca11Jwot5irBVwgkS54zMX3hwJt5g2Y  0.2BTC
1Exca11jnkW6bt7PzzhwrqbLwneyCd9YhT  0.2BTC
1Exca117ik6cR2mySwfpz4GGrUGRx5p3Eh  0.2BTC