Comment Re:The 30% cut goes back to the buyer obviously (Score 4, Informative) 60
No.
When you buy an app
You pay $1.00
Apple gets $0.30
Developer gets $0.70
When you refund an app
You get $1.00 refund
Apple refunds NO MONEY
Developer pays $1.00
So, the developer has effectively paid $0.30 to Apple, when a user gets a refund.