Earlier quoted context omitted.
$600 million in fake dollars? Amazing that they've gotten away with it for that long.
They are not fake, they have all of them. People from the US just can't access them anymore. Tether is the workaround so they can. To add to the excellent summary of patio11: The other side of the coin is that more and more exchanges are using Tether (USDT) as the only thing pegged to the FIAT world in any way (value wise), not having to deal with actual dollars and banks makes the legal side of running an exchange a…
When you go to withdraw from Tethers it basically says "if you don't have more than $50k in claims, go away" [1]. Suffice it to say that most of their customers don't have that.
My guess is that Bitfinex, through a combination of wash trading and Tethers, have been pushing up the price of Bitcoin and they've basically been running a Ponzi scheme.
[0] https://tether.to/wp-content/uploads/2017/09/Final-Tether-Co... -- "This engagement does not comtemplate tests of accounting records or the performance of other procedures performed in an audit or attest engagement"
[1] https://cdn-images-1.medium.com/max/800/1*7BOwdYvUycjNFdUB2e...