The IOUs are being traded, right? So, they´re fungible at least if that means mutually interchangeable. Maybe I´m misunderstanding something.
they have no blockchain to transport the actual token from one exchange to the other, thats why they are not fungible.
And I also think, they could have serious problems paying out the tokens. Maybe they even sell more, than they have... you never know...
Then it means, that you have a token, that is not fungible to a real LISK later, if the prices rise too much and the exchange defaults...
As Rizla2345 said, the pre-launch tokens being traded ARE fungible, they're just not
transferable. And that was my point. Anyway, the exchanges trading pre-launch LISK will simply enable deposits and withdraws of LISK once it launches. If they truly have ICO Lisk as they claim, then it will be a perfectly smooth transition for everyone. Problem is, who really knows...especially with bloombit??
It would be nice if a reputable exchange that is hungry for new users would do pre-launch trading. A good candidate would be Bittrex since they're trustworthy but aren't getting a lot of traction. Another good candidate would be OpenLedger since they're in the process of bootstrapping their decentralized exchange which, incidentally, runs on Bitshares (the inventor of DPoS).