Doesn't the project continues anyway?
If ARK doesn't met the minimum threshold by this Sunday, 11th of December, 19:00 UTC you will be able to request the refund if you wish so, but we are still continuing on with this project and if you wish you can opt to stay in the project and receive ARK tokens for your exchange when we start the main net no later than 1st of Feb - choice is yours, ARK is here to stay and deliver .
Will it be possible to have another crowdfunding (or token exchange) at a later time? Or is this a one time deal.
Some of the goal in the whitepaper, like the card network and POS hardware has a 10000 and 15000 BTC threshold.
It might be easer to raise that kind of money when the network is running.