Put me on the list for NO REFUND POSSIBLE. I bought LP9 on 6/29. I emailed/called numerous times.
I couldn't get anywhere when calling - they just told me I had to email Express Lane. No luck there as I kept reaching the same rep named Ramil. He gave me the typical canned answers. He even said he asked a senior advisor and no dice.
After stating he spoke to a senior advisor, he did say something interesting:
"I've been advised that all purchases in iTunes are a final sale and although it is occasionally possible to make an exception to this policy, the amount of time that has passed since these purchases was made prohibits us from refunding them. As a result, arranging a refund is something that we will not be able to facilitate for you."
I did not ask for more info here as I really don't want to deal with it any longer. I've emailed, called, and submitted feedback. Maybe Apple will listen and in time offer us the refund/discounted upgrade that those of us who purchased LP9 less than 30 days prior to LPX's release fully deserve.
I do know, however, that this is the kind of thing that makes you second guess your buying options.