So you will accept without any confirmation? Sounds risky for you.
There's a way to be sure about the confirmation.
What do you think of this idea,would you pay a fee to get this service?
If there is the vast network of being able to transfer different alt coins to different exchanges quickly, I am all for it and don't mind paying for much more than .4% too
With bitcoins alone, I would be lukewarm interested and only on rare ocassions if my BTC is trapped in one exchange and need to buy a coin from another exchange because its cheaper there.