As far as I understood the paypal payments came in as part of the IGG campaign, not separate from it. So the Ubuntu Phone campaing would face the same problem. As would face any other IGG campaign. I seriously don't understand the rationale behind that:
a) either Paypal/IGG can afford the risk
or
b) issues like this will crop up again and again and again, leaving frustrated businesses and a bad impression behind, regardless of who's technically to blame.
or c) I'm missing some point here.
The other thing I'm desperately trying to understand is why PayPal claims that the refund risk is high. Almost all benefits given by the IGG campaign are intangible or of neglectable value compared to the funding you give. The first tangible item starts at the 67USD tier (a postcard from iceland [!]). Later items include a T-Shirt for 256 USD and some overpriced USB-sticks. If someone at PP actually read through the descriptions, it would be pretty obvious that any backer was aware of what he's doing.