I'm pretty sure that is an IGG thing. The campaign does not get a penny if the goal is not reached.
If the goal is reached on time they will get the money (less the cut IGG take), and at that point there are no refunds available from IGG (well there are the fortnight after the perk has been taken, but that usually only affect late investors). Any possible refunds after that, will depend on the good will of the campaign owner..
And the last part is NOT an unfair thing, as taking a perk is making an investment, where the investors has all the risk, and hope to get what they perked for